It's large enough to fit a 20cm ruler. It's perfect for a pencil case. The opening has a spring, so you can open it with one hand in one action. It closes with an auto-lock (lol). It's 22cm x 12cm. The opening is 10cm wide. - Color: Navy, White, Light Purple - Material: Fabric - Size: Approximately 22cm x 12 cm - Closure Type: Zipper Thank you for looking. We have cats in our workshop. Please be aware if you have severe cat allergies.