Birthday Owls Dog Collar. Get the party started with this adorable collar! Nylon ribbon collar features birthday owls balloons and cupcakes a snap clasp and durable D-ring for easy leash attachment. Sizing: <b>M</b>: Fits necks 10-18 in. x 1 in. W <b>L</b>: Fits necks 18-26 in. x 1 in. W