For children around 3-4 years old, the length will be around knee-length. The elastic stretches quite a bit, so it can be used for larger children as well. The waterproofing is solid, so I've never had it stain the futon. Please note that it will be shipped compressed. Colorful car design children's bedwetting pants. - Design: Colorful print of cars and vehicles - Material: Soft terry cloth lining - Size: Children's - Waist: Elastic Thank you for looking.