I unsually make this style of bookmark in two sizes, but I can easily make other sizes. The sterling silver bookmark above is 125 mm long by 40 mm wide and weighs 38 g. It is readily engraveable either by the hallmarks or on the longer part. You can see other examples on my main website.

The smaller version looks the same as the large version, but only weighs 30g and is about 80 mm long and 40 mm wide. Hallmarked 2020.