Features: Classic wooden abacus. This traditional wooden abacus is suitable for traders, accountants, clerks, students, and teachers, or as a gift for abacus collectors. Creative math game tool to enhance number sense and counting skills. Vintage-style abacus with wooden beads, ideal for students, teens, and math lessons. Portable and durable design with 13, 15, or 17 rows; 5 beads per row. Sturdy wooden frame and smooth wooden beads. Lightweight and durable. Traditional counting tool that supports early math learning and mental calculation. Features a reset mechanism. Smooth, polished frame with no rough edges. Specifications: Material: Wood, metal, rubber. Types: 13-row with red beads; 13-row with black coffee-colored beads; 13-row with white cream-colored beads; 15-row with black and red beads; 17-row with red cream-colored beads; 17-row with white beads; 17-row with black coffee-colored beads; 17-row with black and red beads. Small size: Approx. 24.5 x 7.5 x 2 in / 9.65 x 2.95 x 0.79 cm. Medium size: Approx. 34.6 x 8.6 x 2.1 in / 13.62 x 3.39 x 0.83 cm. Large size: Approx. 38.6 x 9.2 x 2.1 in / 15.2 x 3.62 x 0.83 cm. Weight: Approx. 241 g. Note: 1. Please allow up to 1 cm measurement variance due to manual measurement. 2. Screen settings may cause slight color variation from actual product. Package includes: 1 portable wooden abacus.