This anchor is made for jewelry, the length is 40mm, the minimum thickness is 1.5 mm. the inside round has 5 mm diameter. and weight is 18.9 g yellow gold 18k. You can rescale it to 1/2 but I strongly suggest not to do it on your own, ask me to do it, if you do it on your own it may not have enough strength, and bend or break while you are using it.The rope is a separate object, so you can remove it on your own, or if you don't like the position ask me to change it.