This is an old question but for anyone else wondering, I bought these today and the largest in the pack is almost 4"x4", and the smallest is about 2.5"x2.5" (the stones graduate in size). Most are about 1/2" thick, but one was a bit over 3/4" thick. They're a pretty lightweight stone - if someone wanted to make a structure more than 2 stones tall or to make a hiding place, I would suggest the XL size stones as they're much bigger and much heavier, and less likely for your pet to accidentally knock the stones over and hurt themselves.
answered 7 months ago
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