This is a Stella and Dot Sidekick crossbody.
Features - 
Cut out design on front flap
Studs on front flap
Geometric fabric lining
Zipper interior pocket
4 Credit card slots
1 External pocket
Removable strap so you can use as a clutch
Measurements - 
Length - 6"
Width - 2"
Height - 4"
Strap Drop ~ Adjustable due to buckle