Sizing Guide (Measure Around Kneecap)
  XS S M L XL XXL
PST Neoprene OS Sleeve 10-12" 12-14" 14-16" 16-18" 18-20" 20-22"
PST Narrow Fitted OS Straps 12-16" S/M fits both 16-20" L/XL fits both
PST Medium Fitted OS Straps 10-13" Order S/M 13 -18" Order L/XL