Features: and high quality Classic wooden abacus. This traditional wooden abacus is ideal for traders, accountants, clerks, students, and teachers, or a great gift for abacus collectors. For creative math games. Use this math resource to enhance children's number bond and counting skills. Vintage-style abacus with wooden beads, perfect for students, teens, learners, math lessons, and classroom use. Portable and durable design. This classic abacus features 13, 15, or 17 rows with 5 beads per row. Constructed with a sturdy ABS frame and wooden beads. Lightweight, waterproof, and long-lasting. Traditional counting toy. This abacus serves as an educational tool that helps develop children's practical math abilities and stimulates brain activity, supporting cognitive development. Also suitable for older students learning mental calculation. Includes reset button. Well-crafted with a smoothly polished frame and a burr-free surface for comfortable handling without risk of hand irritation. Specifications: Material: Wood, metal, rubber Type: 13-row & red beads; 13-row & black coffee; 13-row & white cream-colored; 15-row & black red; 17-row & red cream-colored; 17-row & white; 17-row & black coffee; 17-row & black red Small size: Approx. 24.5x7.5x2in / 9.65x2.95x0.79cm Medium size: Approx. 34.6x8.6x2.1in / 13.62x3.39x0.83cm Large size: Approx. 38.6x9.2x2.1in / 15.2x3.62x0.83cm Weight: Approx. 241g Note: 1. Please allow 0–1 cm error due to manual measurement. Please ensure you are comfortable with this before purchasing. 2. Due to differences in monitor displays, the actual color of the item may vary slightly from the images shown. Package includes: 1 piece portable wooden abacus