These tapes are zero centered and make centering your warp in the reed a snap. The tapes have a peel off backing. The center of the tape is placed at the middle of your beater or shuttle race. The measuring tape counts up from the center point.
These horizontal centering tapes are available in 48" (measuring up to 24" each side of 0) and 36" (measuring up to 18" each size of zero). The tapes can be easily trimmed on each end to fit your loom.