I think with all the additional info, and if Sophie's paws are actually 1/2" wide, then I say go with the 1s. Also ordering some fleece ones that Alaskayorkie suggested wouldn't hurt either, they are very inexpensive.
__________________  The T.U.B. Pack! Toto, Uni, & Bindi
RIP Lord Scrappington Montgomery McLimpybottom aka El Lenguo the Handicapped Ninja 10-12-12 
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