Scuba Dive Fin Strap, with rubber pull pad

XXXL:370mm,              XXL: 340mm
XL - 290mm,                   L - 260mm
M - 240mm,                   S - 220mm 

One buckle apply for dual types. 
Heavy duty nylon tube webbing
Internal caveline to limit overstretching
Large post buckle fits most of today's fins and old school rubber fins
Optional small post buckle fits split fins and old school rubber fins