Wide-cut shorts built for knees and kicks — the traditional Thai pattern, not a boxing short with a different print.
Apollo Cyclone Muay Thai Shorts
$61.99
Apollo Fire Serpent Muay Thai Shorts
$63.99
Apollo Flux Muay Thai Shorts
$62.99
Apollo Monsoon Muay Thai Shorts
$54.99
Apollo Mosaic Muay Thai Shorts
$40.99
Apollo Primal Muay Thai Shorts
$61.99
Apollo Revenant Muay Thai Shorts
$49.99
Apollo Tempest Muay Thai Shorts
$50.99
Apollo Tigerclaw Muay Thai Shorts
$60.99
Apollo Warpath Muay Thai Shorts
$43.99
Muay Thai shorts look oversized next to every other kind of fight short, and that is the design rather than a sizing error. The leg is cut wide and the hem sits high on the thigh so nothing catches when a knee comes up or a kick travels above the waist. Put a boxer in Thai shorts and they look comically short; put a Thai fighter in boxing shorts and they cannot throw a head kick without the fabric stopping the leg.
The difference from MMA shorts matters more than the difference from boxing shorts. Fight shorts for MMA are cut close and built from four-way stretch with a flat closure, because grappling means anything loose becomes a handle and anything bulky becomes a pressure point on the mat. Thai shorts are loose satin or polyester with a wide elasticated or drawcord waist, because nobody is taking you down and the only thing the cut has to do is stay out of the way of your legs. Wearing Thai shorts to a grappling round is how you find out what a fistful of loose satin does in a scramble.
Size on your waist, not on a letter. Thai shorts run on a wide elasticated waistband that sits on the hip, and the traditional pattern is sized generously through the seat — most people take the size matching their actual waist measurement rather than sizing up the way they would with fight shorts. If you are between sizes, the drawcord takes up more slack than it lets out, so the smaller size is usually the safer pick.
The high-cut leg is a legal requirement in competition as much as a comfort one: sanctioned Muay Thai requires shorts that leave the knee clear so knee strikes can be seen and scored. Anything cut to the knee reads as kickboxing kit and will be sent back to change at most Thai rules events.
Satin is the traditional shell and still the most common. It is light, it dries fast, and it slides rather than grips, which is what you want against a shin. Polyester blends cost less and hold a print better; both are fine for training. Wash cold and hang dry either way — a hot dryer will cook the sheen off satin and shrink the waistband elastic faster than anything else you do to them.