Features: Circular graduated wood stick, can be used to measure dimension such as length and diameter, making it convenient for precise measurement. Made of high quality wood, with a smooth front, clear and visible markings, sturdy and easy to clean. Suitable for professionals and daily users in various industries, such as engineers, designers, students, etc. It can be widely applied in field such as architecture, mapping, handicrafts, education, etc., helping users accurately measure and complete various tasks. Expand your jewelry crafting capabilities with this versatile rod, which not only measures and adjusts ring sizes but also aids in creating custom pieces that fit perfectly. Specifications: Component:Wood Type:Type1/Type2/Type3/Type4/Type5/Type6/Type7 Type1 Size:Approx.7.7x30x3.5cm/3.03x11.81x1.38inches Type2 Size:Approx.7.7x30x3.5cm/3.03x11.81x1.38inches Type3 Size:Approx.7.1x30x4.3cm/2.8x11.81x1.69inches Type4 Size:Approx.7.1x30x4cm/2.8x11.81x1.57inches Type5 Size:Approx.7.2x30x3.6cm/2.83x11.81x1.42inches Type6 Size:Approx.6.2x19.5x3.3cm/2.44x7.68x1.3inches Type7 Size:Approx.6.9x19.5x5cm/2.72x7.68x1.97inches Package Includes: 1Piece Wood Stick with Measurements note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!