EASY TO DIY It can be used for kindergarten parent-child activities and school classroom exercises. CLASSICAL AND DURABLE Solid wood rib makes this umbrella more sturdy and durable. Specifications: Main Material Paper Rib Material: Wood Diameter 20cm, 30cm, 40cm, 60cm (Optional) Weight Approx. 8~93g Package Included: 1 x Paper Umbrella Features: Diameter(opening) Length20cm / 7.87in 16.5cm / 6.50in30cm / 11.81in 23.5cm / 9.25in40cm / 15.75in 30cm / 11.81in60cm / 23.62in 42cm / 16.54in Note:1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. The paper material of this product is relatively easy to break, so be careful not to use excessive force.