Make sure to measure your dog's girth.  Please see the instructional picture below to properly measure your dog's girth.
<br />
<br />Comfort Soft Vest - Includes 2  Velcro patches 'SERVICE DOG'
<br />
<br />SIZE : (Adjustable)
<br />
<br />M  Fits GIRTH 18  - 24 inches  (45cm - 60cm),  Back length:14 inches (35cm)
<br />
<br /> L  Fits GIRTH 24  - 31 inches  (60cm - 80cm),  Back length:16 inches (40cm)
<br />
<br />XL  Fits GIRTH 27  - 35 inches  (70cm - 90cm),  Back length:18 inches (45cm) 
<br />
<br />XXL  Fits GIRTH 31  - 39 inches  (80cm - 100cm),  Back length:20 inches (50cm)
<br />
<br />XXXL  Fits GIRTH 35 - 43 inches  (90cm - 115cm),  Back length:24 inches (62cm)
<br />
<br />Bags:  L*W*H
<br />19*16*7cm
<br />
<br />please measure your dogs Chest .