In the below photo that I took you can see that Under The Sea (on the bottom) are wider than Crinklz, Rearz Lil Monsters, and even larger than Rearz Rebel.
I just got my first order of Little Rascals (not seen in image) and I'm surprised by how big and fluffy they are, they must be a overnight diaper! When comparing the two I would say that Little Rascals and Under The Sea are the same size; but Little Rascals are just a bit more fluffy. I would also say that Under The Sea is like Rearz Maximum Absorbency diaper 'Safari'.... but after testing both I stocked up on Under The Sea rather than Rearz Safari.
I'm new to ABDL but having tried many diapers I cannot see any fellow ABDL member not liking Under The Sea as a Max Absorb Diaper, especially when AGECOMFORT.COM frequently has them on sale for $27 (CAD) for a pack of 10; cases are an even better deal.
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