OK, Richard, here it is, but only once. I need a favor so I am giving you everything you want. Griffin and Howe reproduction Silver pad, 56/64 thick at center. Hollow is about 24/64 deep. Real English Silver pad, 50/64 thick at center. Hollow is 24/64 deep. London Guns pad, 56/64 at center, but tapered to edge to about 42/64. Fortunately, the hollow is only 16/64 deep. The Griffin pad has 1/2 inch plugs. The original Silver pad has those ridiculous 44/64 plugs that mean only good on big guns. The London Guns pad has nice little 28/64 plugs, making it the most friendly for little guns. The London Guns pad also has a friendly 2 52/64 hole spacing. The Griffin and Silver pads have 3 1/4 spacing. Another good choice would be the NoShoc or Winchester 1922 pads which are identical except for the logos. They are absolutely solid and have small plugs and 3 1/8 hole spacing which makes them very friendly for small guns and cut guns. The logos can be ground off, the Winchester being easier to grind than the NoShoc. I have used them all and recommend them all for specific uses.