Prevents shoelaces from loosening or un-knotting,No shoelace adjustment necessary. No need to cut or change your shoelace. Comes in various colors to match the style of your footwear and Easy-to-use design to secure the shoelaces, especially for children. Suitable for all types of indoor and outdoor activity including athletic events Dimension: Length 20 mm, Width 16 mm, Height 8 mm Plastic / Imported: Made in Korea ATTENTION: LOCKOZ cannot secure and hold shoelaces and knots with 10 mm or larger diameter. Do not extensively bend or twist the hinge. The product does not tie the shoelace. It is meant to securely hold the knot to prevent it from unknotting itself.