Answering my own question for any future mams searching on here. The coral reef fishy pool (which is larger than the aquarium fishy pool) is nice and roomy. I went ahead and ordered it and did a test run with water. It's super comfy and I'm looking fwd to laboring in it. The internal dimension is roughly 50" diameter. I think I'll really like the depth. It's deep enough to cover my whole big ol' belly, but doesn't feel too deep and should be easy to get in and out of. Happy birthing!
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