Features: Adjustable Size: 4 sizes,the material is made of high-quality transparent soft TPU silicone. Ring Custom Design:Adopt the same arc design as the ring.The convex surface can better stick to the ring and prevent it from falling off. Exquisite and Comfortable:Invisible and transparent Plastic material,soft and comfortable, brings you convenience and comfort,while ensuring that your ring will not be lost due to looseness. Versatility and Wide Applicability:The ring size reducer set is suitable for most womens and mens rings. This is a great way to make your ring comfortable to wear without having to adjust the size and keep the jewelry intact. Package Includes: 16 Pieces/set Ring Sizer Specifications: Material: Plastic Dimensions: Outer Diameter X Inner Diameter X Line Thickness Thin Round Coil: Approx.3.5x 1.5x 1mm/1.37x0.59inch Thick Circle Coil: Approx.5x 2.7x 1.2mm/1.97x1.06x0.47inch Thin Flat Coil: Approx.4x 1.8x 2.7mm/1.57x0.71x1.06inch Thick Flat Coil: Approx.4.8 X 2.8x 2.7mm/1.89x1.10x1.06inch Overall Length: About 10cm/3.94inch note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.