This sexy BDSM bra top harness constructed out of black PU Leather straps & silver chain that lead to an o-ring center for the triangle cups. It has adjustable straps at the back of the neck on the collar part & for the back of the underbust strap making it a one size fits most. I'd estimate the band length of the underbust to go out to about 36" & if you need it smaller than the holes provided you can punch more thru the soft but sturdy & high quality PU vegan leather. if you foresee this as an issue, I have a leather hole punch tool & will punch holes upon request from the buyer. NWT, never tried on!