These engraved cufflinks are 20mm x 12mm x 1.5mm.  I was looking at a pair of my great grandfather's cufflinks and they were made, not with a springback, but with a chain and toggle.  I decided to make these in the same fashion and was pleased with the result.  They took longer to make, but I feel they are an elegant reflection of a bygone era!   The distance between the toggle and the front of the link is 15mm.