Tiny holes near the hem: what causes them and how to stop it

Small holes appearing near the hem of a t-shirt look mysterious, but the cause is almost always mechanical, not biological.

Belt buckles, rough waistbands, and rings on your fingers rub against the hem hundreds of times a week, and cotton fibres eventually give way under that repeated friction. Moths are the rare exception, not the rule, despite what most people assume.

This guide walks through the real causes in order of likelihood, how to tell them apart, and what actually stops it from happening again.

This is by far the most common source of hem holes, and it explains why the damage almost always shows up on one side more than the other.

Every time you sit, bend, or reach, the hem of your tee rubs against your belt buckle or jeans button. That contact point takes thousands of small abrasions over a few months of regular wear, and cotton fibre has a limit to how much friction it can absorb before it breaks.

You can usually confirm this cause with a simple check. If the holes cluster right where your belt buckle or jeans button sits, and mostly on the side you favour when reaching for your pocket, friction is the answer.

The fix is not really about the t-shirt. Tucking in, wearing your tee slightly looser through the waist, or choosing a belt with a flatter buckle all reduce the contact pressure that causes this specific wear pattern.

Every wash cycle puts mechanical stress on cotton fibres, especially at stress points like hems, seams, and collars where the fabric is folded and stitched.

Over 50 or more washes, cotton loses a measurable amount of tensile strength, and the hem, being a folded double layer of fabric under constant tension from stitching, is one of the first places that shows it. This is closely related to the wear patterns covered in our 30-wash durability test, which tracks exactly how fabric strength declines with repeated laundering.

Washing machine agitation matters more than most people realise here. A top-load machine with an aggressive agitator physically twists and pulls fabric far more than a front-load machine, and that extra mechanical stress concentrates at hems and seams.

If your tees develop hem thinning faster than expected, and you use a top-load machine on a normal or heavy cycle, switching to a gentle cycle alone often adds real months to hem life. The full logic behind wash settings and fabric longevity is in our guide on how to wash t-shirts so they last longer.

Sometimes the hole is not wear at all. It is a manufacturing weak point that was present from the first wash.

Cheap tees often use a single-needle hem with wide, sparse stitching, which leaves gaps in the seam where fabric is more loosely held and more prone to unravelling into small holes. A denser double-needle hem distributes tension across more stitch points and resists this kind of failure far longer.

You can check this on any tee you own by looking closely at the hem stitch density. If you can easily see daylight through gaps between stitches, that hem was built to fail early, and no amount of gentle washing will change the outcome much.

This is one of the small construction details we pay attention to on the Boring Label round-neck tee, because a hem is one of the highest-friction points on any garment and deserves stitching that matches. It is a minor detail on a spec sheet, but it is the difference between a tee lasting one season at the waistband or three.

Fabric-eating insects are much less common than people assume, but they are not a myth.

Moth damage tends to look different from friction wear. Moth holes are usually more randomly scattered across the garment, not clustered at a single contact point, and they often appear on tees that were stored folded in a drawer or wardrobe for weeks without being worn or moved.

If you find holes on multiple garments stored together, in random spots rather than a consistent friction zone, and especially if you spot small webbing or larvae casings in the drawer, that points to moths or carpet beetles rather than wear. The fix there is storage hygiene: cedar blocks, regular airing, and washing garments before long-term storage since detergent residue and body oils actually attract these insects.

For the vast majority of hem holes, though, this is not the cause, and treating a friction hole with mothballs will not fix anything.

Once you know the cause, the fix is usually specific rather than general.

If it is belt friction, the tee itself is not the problem, your styling is. Wearing your tee slightly untucked at the sides, or choosing trousers with a flatter waistband closure, removes the repeated contact entirely.

If it is wash fatigue, switch to a gentle or delicate cycle, cold water, and air drying instead of a dryer. Our dryer versus line dry guide covers why heat accelerates exactly this kind of fibre breakdown at stress points like hems.

If it is construction quality, the honest answer is that no amount of careful washing fixes a hem that was under-stitched from the factory. This is worth checking before you buy, not after the holes appear, and it is one of the reasons cotton quality claims are worth scrutinising rather than taking at face value.

If it is storage-related insect damage, address the storage environment, not the individual garment. A single cedar block in a drawer of five or six tees is usually enough to prevent recurrence.

A tiny hem hole caught early, before it runs or widens, is genuinely repairable at home in under ten minutes with a needle and matching thread.

A simple whip stitch closing the gap, tied off with a double knot on the inside, holds for months if the surrounding fabric is still structurally sound. This only works while the hole is small and isolated. Once fraying spreads along the stitch line, a patch or repair becomes visible and the tee is better retired to loungewear than office rotation.

Most hem holes come from friction against belts and buckles, not moths, and the second most common cause is simple fabric fatigue from repeated hot washing and aggressive drying. A dense, well-stitched hem resists both far longer than a cheap single-needle construction.

Check where your holes actually cluster before assuming the worst, adjust the habit that is causing the friction, and you will likely stop the problem before it starts on your next tee.