Time saver! One pass in the machine gives you 18 reinforcers instantly. Faux stitching all around. The reinforcer diameter is a tad bigger than 0.5". The hole in the middle is a perfect size. It is small enough to accommodate both 3mm and 4mm eyelets but also most brads. The die itself is 3.75" x 1.75" Please look at my other listings and if you would like multiple items, message me. I consolidate shipping costs.