Shires Karben Alessa Standard Peak Helmet custom_0068 5-1/8" - 5-9/16" length 3:

5-1/8" - 5-9/16" length  3: 5-1/8" - 5-1/2" width

Size:  21" Diameter

This D ring is slightly more compact than a normal 3 1/2" D ring

Girth is adjustable on both sides with elastic ends for easy fit

It requires no inflation as it floats through the air and darts wildly around the ground upon impact

Shires Karben Alessa Standard Peak Helmet custom_0068 5-1/8" - 5-9/16" length 3:The Sonic riding hat range features key Karben safety and comfort measures for reassurance during horse riding activities. Reach for the sky in the Karben Sonic Alessa Riding Helmet. Packed with Karben safety and comfort features, and high on attention grabbing style with plenty of sparkle at the crown of the helmet. The smooth outer shell provides the foundation to thoughtful style features, giving the Sonic riding hat range distinction and universal