I am looking at the larger tumbler which measures 8.3 cms across the top and is 8.5 cms high. The smaller and squatter one is 8 cms across the top and is about 5.5 cms high. These glasses are not quite as thin as the ones from San Sebastian - Bodega glasses that they use for cider etc. There are OK though and will take a lot more dropping without a breakage. Good luck!