We have re-wrap-it ones - DH's would fit two rounds of sandwiches, DD's might, and mine certainly wouldn't. The size just seems to vary a bit randomly between designs - don't know if it's still the case but if you're very keen on getting two rounds in you might want to contact the seller and see which designs are bigger.
FWIW, DH's is 'Big Blue' (which refers to the check rather than the size of the wrap, but IS a big wrap), DD's is pink gingham and mine is the skull & crossbones.