Filigree Rack Plating Brass Snap on Bails, PlatinumSize: about 11mm wide, 24mm long, 7mm thick, hole: 8x3mm. Inner part (place for donut) : about 17.8mm long, 5mm thick. Tip for Fitting: Ensure your donut is not thick than 5mm, with center hole size larger than 5mm, and donut width not larger than 17.8mm.