Size:Extra Small

Size Extra Small (XS) - Riptape (hook and loop) fits waist girth from 10"(25cm) - 12 1/2" (32cm)
                                     - Poppers (plastic snaps) fits a waist girth from 10"(25cm) - 16" (40.5cm)
                                     - Overall product length - waistband to waistband - 10.5" (27cm)

Suitable for: Chihuahuas, small Yorkies, 
Getting the right size:
Step 1).  Measure your girl's waist as shown in this photo:

Step 2). Overall Product length - waistband to waistband 

Riptape - If your dog fits this product length, but exceeds the waist measurement, consider Poppers fastening which has a bigger range. 

Waistband fastening types:
Riptape (hook and loop)                                       Poppers (plastic snaps) 

Photos of our customer's dogs - who are wearing the Extra Small size to give you an additional idea of size of dog vs product size.