About the size:
both deisgn are very strechable and easily fit for XS-L size babies, if you are XL, yes u can fit in also but matter of nice or not :)
anyway as a safe panties, its mean to protect ladies from accidental exposures.

when lay on the floor: the waist band about 28cm, length about 27-29cm.
when strech to the max: the waist band can easily go to 40-44cm. for your reference.