This is a large Cath Kidston tote bag. The material is cotton, and it's made to be durable like canvas. It's strong enough to carry heavy items. I tried putting in two 2-liter plastic bottles, and it still seems to have plenty of space. The base is approximately 20cm x 30cm. The opening, depending on how you spread it, is approximately 27cm x 30cm when opened in a near-square shape. The height is approximately 28cm (excluding the handles). Inside, there are pockets on both the front and back, large enough to hold a paperback book. There's a hook on the inner belt at the opening, which can be used to keep the opening in a near-square shape. There is a slight stain on one side of that belt. Please be aware of this before purchasing. ※ Plastic bottles, paperback books, and a measuring tape are not included with this product.