Instant purchase OK!! This is the January color. Surgical stainless steel necklace * Hypoallergenic * Rust-resistant * Color-fade resistant * Scratch-resistant Birthstone: Garnet Chain thickness: 1mm ± 0.1mm Length: 50cm (Size can be adjusted in 1cm increments) Color: Silver * The birthstone is a color stone. \*\*\*\*\*\*\*\*\*\*\*\*Options\*\*\*\*\*\*\*\*\*\*\*\* Chain length extension: 300 yen per 10cm * Gift box: 300 yen * Adjuster: 100 yen Unisex Price not negotiable