They will range in thickness from 3/8 inch to 3/4 to 1 inch thick (from 10 to 25mm thick.)
Oval in shape, there may or may not be a piece of the shank bone in the middle.
Like most British or American style ham, Ham Steaks require cooking.
A Ham Steak can be grilled (aka bbq’ed in the UK), fried or baked. It is often brushed before cooking with a tangy glaze.
You can also chop them up to use in stir-fries, frittatas, quiches, scrambled eggs, etc. If using in scrambled eggs, fry the ham on its own for a few minutes before pouring the eggs in.