About Taper Design
This leather strap has a tapered width and is thinner on the buckle than at the end of the lug as follows:
18mm on the watch head / 16mm on the buckle head;
19mm on the watch head / 18mm on the buckle head;
20mm on the watch head / 18mm on the buckle head;
21mm on the watch head / 18mm on the buckle head;
22mm on the watch head / 20mm on the buckle head;
23mm on the watch head / 20mm on the buckle head;
24mm on the watch head / 22mm on the buckle head.