A: L28.3 * 7 * 5 cm
B: L38 * 8 * 5 cm
Bought one of these so I could keep all my cups organized next to my tea tray. However, the device is likely designed with a certain style of cup in mind because none of mine rest nicely in it. Some of them don't catch the ridge at all, and others are too thick and slide backward with the slightest bump. I've been able to make the cup stand work, which is why I'm giving it 3 stars, though rather than the cups standing they are stacked and lying face down in the slots of the tray. It works, but not as I had initially intended.