Editorial Review This expansion watch band is from Speidel's Twist-O-Flex Classic collection. The main part of the band is 15.75mm wide, but the end pieces flare out, providing a fit for watches with lug widths from 18mm to 21mm. Speidel Twist-O-Flex Classic " Tapered MSRP: $ | Your Price: Expansion watch band (stretches to fit over your hand) Stainless-steel, silver-tone finish Brushed satin links with polished edges Fits watches with 18mm, 19mm, 20mm, or 21mm lug widths (see size chart) Straight, adjustable end pieces taper to narrower width of 15.75mm Speidel model