The sculptures show several options from the first one has no belt, the next two have belts with dangling ends, one has a buckle the other is tied. The last one is from the Angers Cathedral (1130-1160) and it looks like it has a metal buckle but I can’t tell for sure.
Silk tablet woven belts are well documented with some extant examples.
I’m using 20/2 silk, 30 tablets, and a simple geometric pattern. I’ve done a fair amount of tablet weaving, but I have never worked with silk before. I really like the look of the belt with the buckle from the Chartres Cathedral, and from the depths of my stash (circa 1990) I had a D ring that actually had some bling to it, in the right colors, and is just the right size for the belt!