Kizzi Precision Flightgear
Short NASA watchband (Apollo issue)
Made with original vintage loop tape of exactly the same type used on Apollo and Skylab missions, these are the official short NASA watchbands used for Apollos 13 and 14 at 9½ ins length and ASTP/Skylab at 11½ ins length (P/N SEB12100030-209 and -210 respectively)
Nylon loop tape sourced from 1970's U.S. Defense Supply Agency stock. Being one of the first types of hook and loop tape, the Olive Drab binding tape is actually essential for providing stitched fabric reinforcement. But as this dates from the Apollo era it's the ultimate in authenticity short of being furnished by NASA Flight Crew Integration Division (FCID).
There are two ways to wear the strap: Cinching one springbar first and then threading the strap end through the bottom springbar, or threading the strap through both springbars to cinch the wrist directly with the metal loop.
When using the full length of the strap (including the ½ inch loop tape reinforced with the olive drab binding tape) then the longer Skylab/ASTP watchband strap will accommodate wrist sizes from 6 to 9 inches and the smaller Apollo watchband will accommodate from the smallest wrist size all the way up to 8 inches.
More information about compliance with the NASA watchband blueprint SEB12100030 here.