Specification: The zip baggies are 2 mils thick and measure 7 X 10cm / 2.75 x 3.9inches (actual usable size), perfect for coins, seeds; they are also great for small arts crafts & jewelry. Safe Material: These zip lock poly bags are made from Low-density polyethylene, odorless, non-toxic and eco-friendly. Very durable and strong, can provide good protection and display for your goods. Easy to Use: The seal zipper poly bags are easy to close and open, without the need for impulse sealers or tape. They are completely Airtight and Waterproof to suit various places of use, perfect for organizing, storing, keeping fresh and protecting toy, candy, pill. VERSATILE USE: The poly zipper bags are suitable for plant seeds, spices, nails, screws, jewelry, coins, rings, gifts, safety pins and varieties of small snacks. It's a must have for home and office. Small Storage Plastic Bag: These resealable bags are suitable for various occasions, can easily help you organize and store your goods. If for whatever reason you don't like them, contact us and we'll gladly exchange or completely refund your order!