Hola Sarah, que tal?
You are so lucky being in Seville, I love it there! Just gorgeous. Bet you're glad the summer is over tho, guess you've been really hot! DH would move there if we could, just as well he can't habla la lengua or we'd be off!
My Martha is a skinny one, and I found that side snap nappies were a good fit - medium pocket bots were particularly good. I also have always managed a good fit with medium Fuzzis, cos the two sets of poppers mean that you can adjst as necessary. Even 2 weeks ago (we are now potty trained, fingers crossed) she was still on the smallest waist setting but next to biggest leg setting - really adaptable