Mens Running Gym 2 in 1 Sports Shorts Breathable Outdoor Workout Training Shorts with Pockets

im size 36-38 which shall i order ?

I am size 30 to 32 waist so what size do i order? very confusing.... do i order size l as uk size or size xl asian size??

I have ordered this item twice now in xl however you keep sending me xxl

What are the sizes in inches, i usually where a 36inch to 38inch waist L to XL uk sizes are these similar in size?