Juicy Couture Los Angeles California Pet 
Love Juicy
Care Instructions. Hand Wash Cold Water with Mild Detergent Hang Dry
Instructions: Allow 2 fingers to fit Between Neak area and Dogs Body
http://wwwjuicycouture.com
 
In general Juicy Clothes size will  run small
Extra Small: Lenght [ measure ]  "NECK TO TAIL 8"" [ plus ] Girth "AROUND CHEST 12"" inches
Small: Lenght [ measure ] "NECK TO TAIL 10"" [ plus ] Girth "AROUND CHEST 15"" inches
Medium: Lenght [ measure ] "NECK TO TAIL 13"" [ plus ] Girth "AROUND CHEST 19"" inches 
In Gerneral these a fairly safe rules to go by...
Medium is a a 18 to 15 pound dog
small is 10 to 15 pound dog
X-small 6 to 10 pound dog