The top aperture is 0.4cm/0.15inch********** The hole diameter at the bottom is 0.7cm/0.27inch********** The height is 1.3cm/0.51inch********** A package contains 40pcs drawstring locks********** Used for hoodie draw/Pants strings,Lanyard Clothes Backpack Bag DIY********** NOTE:********** Due to lighting effects, monitor's brightness, contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item.********** Please allow 1-2mm differs due to manual measurement.********** Check the detailed size of the Cord Rope Locks if it fits your requirement before your purchase. Thank you.********** ONLYKXY Thank you for your coming, please do not hesitate to email us for any questions.**********