You won't feel boxed - in with the new block party collection. 3d cubes in contrasting geometric colors stack up across the design. It is a modernistic and sleek design. All-metal buckles: our whisper - weight aluminum buckles weigh less than an ounce! Sizing. The block party dog collar is available in 2 sizes: teacup and xs/s diva - dog adjustable dog collars are made of soft and comfortable nylon overlaid with durable polyester ribbon, which is quintuple stitched at stress points for added strength.