These boxes are stackable, sturdy and durable. They are designed to hold A4 paper and files as well as larger files/household items. Each size has a reinforced base and corners for strength and durability, is impact resistant, and comes with a separate lid with strong clip-lock clamps, making it the ideal heavy duty, premium storage solution Features Separate lid with strong, clip-lock clamps, in a mix of colours Reinforced base and corners Stackable - lids feature integral location guides for non-slip stacking The insert trays are ideal for organising a range of smaller items including DIY accessories, arts & craft and Christmas decorations. The small insert tray fits 5.5L & 10L boxes. The large insert tray fits 24L & 36L boxes. Dimensions 5.5L - 40 x 26 x 8 cm - holds one ream of A4 paper 10L - 40 x 26 x 15 cm - holds two reams of A4 paper 15L - 47 x 30 x 17 cm - Larger than A4, suitable for bigger files 24L - 48 x 38 x 19 cm - Larger than A4, suitable for bigger files 36L - 48 x 38 x 32 cm - Larger than A4, suitable for bigger files 48L - 49 x 44 x 32 cm - Larger than A4, suitable for bigger files 54L - 64 x 38 x 31 cm - Larger than A4, suitable for bigger files Small insert tray - 34 x 21 x 4.5 cm Large insert tray - 37 x 31 x 9 cm