For anyone wanting to know the size of these plates, they are 39cm - at least mine are. The only place I could find which stated the size before I bought them (despite alot of time spent trying) was another customer review on here - theirs were bigger - 43cm. As I am using these for deadlifts, this is a bit annoying as I still have to put a board under each plate to get the bar at the right height (which I believe is 22.5 cm off the ground - 20kg+ olympic plates are 45cm diameter as standard). However, the plates are good quality, not too wide (3.5cm), and I couldn't find them cheaper. Very quick delivery too, so overall I'm pleased and don't regret purchase - I just wish manufacturer's would state measurements. York are by no means alone on this, I struggled to find any standard weight plate's diameter.