Buttons can be changed to 15mm. Ambulance: approx. 11 x 7.5 cm Fire truck: approx. 10 x 8 cm Mail truck: approx. 12.5 x 7 cm Police car: approx. 11 x 8.5 cm Garbage truck: approx. 12 x 8 cm Popular button-tying practice for nursery schools, kindergartens, and Montessori education. This activity promotes fine motor skill development, increases independence and concentration, and helps with putting on and taking off clothes. Made so that even if they can't do it well yet, they can enjoy it slowly with colorful vehicles of red! blue! yellow! Recommended for studying numbers too. Tools for home Montessori. Great for indoor play in the coming cold season!! Waiting time when going out and preparation for entering school ☆ Also recommended as a gift. ◯ Felt, thread ◯ Production environment: No smokers, no pets ☆ Double-layered felt ☆ ※ Please note that there may be distortions and individual differences as this is handmade by an amateur. ※ We are not responsible for any accidents after purchase. Please be careful of accidental ingestion when small children play with it.