With the cooler weather in the air we have noticed an increase in sweater purchases!(The MOM and DAD style still rating our #1 seller) If you find that your pet(s) sizing is in between our chart, please do not worry! We have your pet covered! Everything is custom made to order, so simply put your pet(s) measurements in the "instructions to seller" box when checking out, and we will make sure you have the appropriate fit! =) Here is our Betty Boop showing you exactly where to measure.