Description from the vendor website:

The Treat Trader™ is a quick-access, waist-worn dog treat bag designed for hands-free training sessions and everyday adventures. The secure magnetic closure keeps treats easily accessible with one hand when needed, and closes with an audible cue to keep them secure on the go. The durable shell fabric and lightweight, waterproof lining keep treats fresh and contained. A small zippered outer pocket fits a key fob, some pick-up bags, and includes a clicker-compatible loop. Bend and mold the rim for a comfortable fit, whether you wear it with the included adjustable belt or attach it directly to your waist with the integrated belt clip.

Adjustable Belt: 30 to 48in (76.2 - 121.9 cm)

Dimensions: 6 in x 5.3 in x 4.9 in (15.5 cm x 13.5 cm x 12.5 cm)