Material:It is made of durable copper,durable and sturdy,not easy to rust and break. Size: the finger guard is medium, approx. 1.8 x 2.5 cm (L x H). It is adjustable, suitable for most people fingers. Box contents: 3 x finger pads, enough for long time use. Wide Applications: It can be applied for needlework, sewing, embroidery and so on, It is a good tool for anyone who loves sewing to protect their fingers well. Effective: there are many dents on the surface, which usually wear out on the middle finger, this adjustable thimble can protect the finger when the needle is over the cloth, and can apply good force to penetrate clothes. Description: This vintage metal open-sided copper thimble perfect for long fingernails. It can provide complete protection, including the top, the Central so you don't have to buy the others thimbles and the amount it is enough for one or two people to use. (Always keep one for emergency) Specifications: Material: brass Quantity:3pcs Size: approx. 17 x 26 mm / 0.68 x 1 inch Package Includes: 3 x Finger Protector Thimbles Note: It is not recommended to adjust the size often as the material is copper.