|I would call or e-mail ME directly to ask them for the thigh measurements for the L Sandys (you can ask about both S and L, but given the huge thighs, age, and weight, I wouldn't consider the S if I were you). ME does their intro pack for a Sandys, but I believe that you need to call for it. I guess it depends on the measurements you get, but I'd recommend taking advantage of that with a L Sandys. You can always use an extra L AF cover, since babies, esp. big ones, can be in those forever, and that way you can see for yourself how it fits before committing a larger chunk of money.