I bought these bags a long time ago to use for my arts and crafts ideas but never did :-). I dont remember the GSMs or anything about them but I can feel they are of great quality and strong. the banners I got them from hobby crafts and they are still with tags. there are 14 pieces total, 5 of the charcoal bags, 5 of the ivory ones and one ivory of different size, and then 3 banners. thank you. This plain natural cotton tote bag is perfect for casual shopping or everyday use. With a medium size and double handles, it is lightweight and easy to carry. The rectangular shape and open closure make it practical for quick access. The exterior and lining are made of soft cotton, with a matte finish in mixed colours. Ideal for women who appreciate simplicity and nature-themed accessories.