The Worthy Dog Sidekick Harness, Royal Blue, Medium (18-21-in)

Tiny (9-11-in) XX-Small (12-14-in) X-Small (14-16-in) Small (16-18-in) Medium (18-21-in) Large (21-24-in) X-Large (22-25-in) XX-Large (27-31-in) 3X-Large (32-36-in)