Quick answer To start locs, match the method to your length and texture — comb coils from about 2 inches on type 3 and 4 hair, two-strand twists from 4 to 5 inches — then part clean, detangled hair evenly, coil or twist each section, and leave them alone between retwists.
Learning how to start locs well matters because install day is the hardest stage of the journey to redo. The method you choose decides how much length you need on day one, how your locs look for the first year and whether you can change your mind.
The size of each part sets, roughly, the size of every loc you’ll wear for years. Most costly mistakes, from roots that thin to parts that show more scalp than you wanted, happen in that first sitting.
The good news is that comb coils and two-strand twists are both realistic at home with clean hair, a rat-tail comb, a light gel and a free afternoon or two. This guide compares the five main starting methods by length, texture and how easily you can undo them. It helps you choose between a loctician and doing it yourself, and it ends with a three-month care calendar so you know which awkward stages are normal.
Time 3-8 hours for a full head (small locs take longer)Difficulty IntermediateSteps 9
Loc Starting Methods Compared
| Method | Minimum length | Best for | Easy to undo? |
|---|---|---|---|
| Comb coils | About 2 in | Type 3 and 4 hair | Only in the early weeks |
| Two-strand twists | 4–5 in | A fuller loc from day one | Easiest — only wrapped |
| Interlocking | Varies — ask a loctician | A smoother loc | Hard — threaded |
| Backcombing | Varies — ask a loctician | Hair that won’t hold a coil | Hard — tangled on purpose |
| Free-form | Any length | Least tension and handling | Rarely, without cutting |
What You’ll Need
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- Soft measuring tape Measures a gently stretched strand so you know which methods your length allows, then checks that your test part and later parts are the width you planned.
- Rat-tail comb The tail cuts clean parts and the fine-tooth end winds comb coils, so one tool handles both sectioning and coiling.
- Residue-free clarifying shampoo Strips oils, silicones and old product before install and keeps the scalp clean without leaving buildup inside young locs.
- Rinse-out conditioner Gives the slip to finger-detangle before install and then rinses out completely, so the strands can grip each other.
- Water-based loc gel Helps coils and twists hold their shape without the heavy residue that waxes and butters leave inside a loc.
- Sectioning clips Hold unparted hair out of the way so every new part stays crisp and every loc starts the same size.
- Satin bonnet or scarf Cuts the friction and lint a cotton pillowcase leaves behind while new locs are still loose.
- Stocking cap Pulled over young coils and twists during a wash so they can’t unravel while you clean your scalp.
Step-by-Step
Step 1 Measure your length and texture
Gently stretch a strand at the crown and another at the nape, then measure each from scalp to tip with a soft measuring tape, because tightly coiled hair shrinks and can hide how much length you really have.
Comb coils need about 2 inches and two-strand twists around 4 to 5 inches, so your shortest section decides which methods you can use today. Next, wind a small section around the fine-tooth end of a rat-tail comb and slide it off: if the coil holds its shape, your texture will coil, while hair that drops straight out suits methods that knot or tangle it instead.
Chemically straightened ends don’t lock the way natural texture does, so expect your locs to form in your natural growth. You’re ready to choose once you know your shortest length and whether your hair holds a coil.
Step 2 Compare comb coils and two-strand twists
Comb coils, made by winding each section around the fine-tooth end of a rat-tail comb, are the most common start for type 3 and 4 hair and work from about 2 inches, giving small, neat starter locs.
The trade-off is that they’re fragile: young coils can unravel when washed, and you can comb them back out only in the early weeks, before matting sets in. Two-strand twists need 4 to 5 inches and look fuller from day one, and they are among the easiest starts to take back out, because the hair is only wrapped around itself rather than threaded.
Expect the pattern to linger, though, since twist lines can take 6 months to 2 years to disappear completely. If your length allows both, choose coils for a neat, uniform start and twists for a fuller loc that is easier to take out.
Step 3 Weigh interlocking, backcombing and free-form
Interlocking pulls the end of each section back through its own root, which removes air pockets for a smoother loc and holds up well to washing early on. It is usually done by a professional, threaded hair is hard to undo, and the minimum length varies, so ask a loctician.
Backcombing teases each section toward the scalp with the fine teeth of a comb to force matting, which makes it a common route for straight or wavy hair that won’t hold a coil, but it starts frizzy, the length it needs varies (again, ask a loctician), and deliberately tangled hair is hard to take out.
Free-form skips parting and twisting entirely: you keep washing, stop combing and let the hair clump on its own, so it works at any length and puts the least tension on your scalp.
The cost is control, because size and shape are unpredictable and once matted it is rarely undone without cutting, which is why many free-formers still pull apart roots that fuse so a few locs don’t merge into one.
Step 4 Decide between a loctician and DIY
Comb coils and two-strand twists are realistic at home if you have several hours and a helper for the back, because the technique is simple and the main risk is uneven sizing in sections you can’t see.
Book a loctician for interlocking, for very small locs or for a precise grid, since the parting at the crown and nape sets the look for years and is the hardest part to judge on your own head.
A consultation is worth it even if you plan to do it yourself: a loctician can confirm your length, map the parts with you and show you how firm a coil should feel at the root. Whoever installs them, nothing should feel tight, sting or pull, because constant tension at the root can cause traction hair loss.
Step 5 Start on clean, detangled hair
Wash with a residue-free clarifying shampoo to strip oils, silicones and old styling product, because anything left on the hair now gets locked inside the loc for good.
Finger-detangle with a rinse-out conditioner, working from the ends up to the roots, then rinse until the hair no longer feels slippery, since leftover slip stops the strands gripping each other. Skip leave-ins, butters and waxes on install day.
The only product you need is a light, water-based loc gel, which helps sections hold without the heavy residue that builds up inside young locs. Squeeze out excess water by hand so the hair is damp rather than dripping, and start once it feels clean, tangle-free and grippy between your fingers.
Step 6 Plan your parts and loc size
The size you start is roughly the size you keep, so pick a part size first, measured across one side of each square: parts of about 1/4 to 1/2 inch make small locs, 1/2 to 1 inch makes medium locs and 1 to 1 1/2 inches makes large ones.
Under about 1/4 inch is microloc territory, which takes far longer to install and is more prone to thinning or breaking at the root, while sections much over 1 1/2 inches tend to split or merge as they mature.
Part one test section with the tail of the rat-tail comb, check its width with your measuring tape and have your helper photograph it, because a size that looks right up close often looks smaller across a whole head; for a rough total, multiply the parts in one ear-to-ear row by the number of rows from hairline to nape.
Then choose a pattern: square grid parts show the scalp in straight lines, while a brick-lay pattern, with each row offset like bricks, hides the scalp better as the locs hang.
Keep hairline parts close to the size of the rest, since edge hair is often finer and a thin loc on fine hair is where thinning tends to start, and hold unparted hair out of the way with sectioning clips so every new part stays crisp.
Step 7 Coil or twist each section gently
Work one section at a time, starting with your test section: smooth a small amount of loc gel through it, then either wind it around the fine-tooth end of the rat-tail comb from root to tip for a coil, or split it into two equal halves and twist them around each other down to the ends, wrapping the last bit around your finger so the ends stay closed.
Keep the base firm but relaxed, sitting flat on the scalp without lifting or puckering the skin, because tension here causes soreness and, over time, thinning.
Every row or so, compare a few new bases with that first test loc or its photo, and lay the measuring tape across a part if you’re unsure, because parts tend to creep wider or narrower as you tire and are easy to redo now but hard to fix once the hair mats.
A section is done when it holds its shape on its own, and the head is done when your scalp feels comfortable rather than tight or tender.
Step 8 Protect them through the first weeks
Keep your hands off for the first couple of weeks, because touching, palm-rolling and restyling loosen young coils and twists before they can start to mat. Sleep in a satin bonnet or scarf every night, since cotton pillowcases cause friction and leave lint that gets trapped in new locs.
When it’s time to wash, pull a stocking cap over the hair so coils can’t unravel, focus the residue-free shampoo on your scalp and squeeze the suds through the lengths rather than rubbing.
Rinse until the water runs clear, squeeze out the excess and let the locs air-dry completely before covering them, because locs left damp under a bonnet can develop a musty smell that’s hard to shift.
Step 9 Follow a three-month care calendar
Month one: wash about every one to two weeks (or as your loctician advises), use only a light gel at the roots, and expect frizz, because frizz is the hair starting to tangle into a loc. Month two: hold the first retwist until about four weeks in, then space retwists four to six weeks apart, since retwisting more often stresses the root and can thin locs over time.
Budding often shows up around now, a small firm bulb forming inside the loc that you should leave alone. Month three: as the hair mats it contracts, so locs may look shorter and puffier than on day one, and that shrinking stage is part of the process, not a sign anything is failing.
Throughout, keep butters, waxes and creamy leave-ins out of your routine because they build up inside a loc where shampoo can’t reach, and remember that twist lines can take 6 months to 2 years to disappear.
Common Mistakes to Avoid
- Retwisting every week or two to keep roots neat: over-retwisting stresses the root and can thin locs over time.
- Installing so tightly that the scalp puckers, stings or feels sore. That constant tension can lead to traction hair loss.
- Making parts much smaller than you really want and expecting the locs to fill out later, when the size you start is roughly the size you keep.
- Coating new locs in butters, waxes or creamy leave-ins that get trapped inside the loc as buildup.
- Going to bed with damp locs under a bonnet, which can leave a musty smell that’s hard to shift.
- Cutting off buds or trying to smooth away frizz in the first months, when both are signs the hair is locking.
Pro tip Before committing to a full head, install three or four test locs at the back of the crown with your chosen method and live with them through one wash. You’ll learn whether your hair actually holds that method and how big that part size really looks once the hair shrinks, which is far easier than redoing a whole head.
The Bottom Line
Starting locs well comes down to three day-one decisions: a method your length and texture can hold, a part size you’re happy to wear for years, and roots that sit comfortably rather than tight. After that the job is mostly patience. Wash gently, sleep in satin, keep products light and space retwists four to six weeks apart while frizz, buds and shrinkage do their work.
See a loctician if your scalp stays sore or bumpy after the install, if locs start thinning at the root, or if you want interlocking or a precise grid. Once your locs reach the budding stage, our starter-loc maintenance guide picks up where this one ends.
Frequently Asked Questions
How long does my hair need to be to start locs?
It depends on the method. Comb coils, the most common start for type 3 and 4 hair, need about 2 inches, and two-strand twists need around 4 to 5 inches. Free-form works at any length, while the minimum for interlocking or backcombing varies, so have a loctician confirm yours before install day.
Which loc starting method is easiest to undo?
Two-strand twists are among the easiest to take out, because the hair is only wrapped around itself rather than threaded. Comb coils can usually be combed out in the early weeks, before they mat. Interlocked, backcombed and free-formed hair is much harder to undo: once it has matted, removal means hours of patient detangling or cutting.
How long does it take for starter locs to lock?
There's no fixed timeline, because texture, method and care all change the pace. Expect frizz early, then budding and a shrinking stage in which locs look shorter and puffier, all of which are normal. If you started with two-strand twists, the twist lines can take 6 months to 2 years to disappear completely.
How often should I retwist starter locs?
Many locticians hold the first retwist until about four weeks in and space retwists four to six weeks apart after that. Retwisting more often stresses the root and can thin locs over time. Keep each retwist gentle and use a light, wax-free loc gel. Your scalp should never feel tight or sore afterward.
Can you wash starter locs?
Yes. Wash about every one to two weeks, or as your loctician advises, focusing a residue-free shampoo on the scalp. A stocking cap pulled over young coils keeps them from unraveling. Squeeze the suds through rather than rubbing, then let the locs air-dry completely before covering them, since damp locs can develop a musty smell.
Keep Reading
Sources
- Methods to start locs curlcentric.com
- Which loc method is best curlcentric.com
- curlcentric.com curlcentric.com
