Watches with odd width lugs (e.g. 21mm, 23mm etc.) are not uncommon, and this is a question I am asked a lot. Yes, I can make the strap the same width as the lug width of the watch, but buckles are normally made in even widths only (e.g. 20mm, 22mm, 24mm etc.). As my straps are parallel this means (if you want me to supply a buckle) it will need a buckle that is 1mm wider than the strap width (e.g. for a watch with 21mm lugs you will have a 21mm wide strap with a 22mm buckle fitted). This will mean there will be a very small gap where the buckle is attached to the strap, but it will be hardly noticeable (especially when the strap is being worn).