It's very convenient because you can use it according to your needs! The wide opening makes it easy to see and take out the contents. Only the largest size pouch has a zippered pocket inside. When not in use, you can also store them together like a Matryoshka doll. Large (Width 20cm, Height 15cm, Depth 6.5cm) Medium (Width 16.5cm, Height 12cm, Depth 6cm) Small (Width 13cm, Height 9.5cm, Depth 4.5cm) Mini (Width 10cm, Height 7cm, Depth 3.5cm) Color: White系 (White-based)