Plastic Zip Bag Size Guide – mm to Inches

Use this guide to compare all our available resealable plastic zip bag sizes in millimetres and approximate inches. Choosing the correct size helps make sure your items fit comfortably inside the bag.

All measurements are shown as width x length. The length is measured from the bottom of the bag up to the grip seal. The small lip above the grip seal is not included in the stated measurement. Because of the sealed side edges, the usable internal width may be slightly smaller than the overall width shown.

Available sizes

20x20mm — approximately 0.8x0.8 inches
25x25mm — approximately 1x1 inch
30x30mm — approximately 1.2x1.2 inches
35x35mm — approximately 1.4x1.4 inches
40x40mm — approximately 1.6x1.6 inches
40x60mm — approximately 1.6x2.4 inches
45x45mm — approximately 1.8x1.8 inches
50x50mm — approximately 2x2 inches
60x60mm — approximately 2.4x2.4 inches
70x70mm — approximately 2.8x2.8 inches
80x80mm — approximately 3.1x3.1 inches
100x100mm — approximately 3.9x3.9 inches
120x120mm — approximately 4.7x4.7 inches
150x150mm — approximately 5.9x5.9 inches

Our reusable resealable plastic bags are available in clear, coloured, printed and mixed options, depending on the size and current stock. They are suitable for jewellery, beads, crafts, small parts, samples, packaging, organisation and everyday storage.

Inch measurements are approximate. Please check the exact millimetre measurement on each product page before ordering. All products are supplied in packs of 100 bags.

Orders placed before 3pm Monday to Friday are normally dispatched the same working day. Free Royal Mail Tracked 48 delivery is available on UK orders of £8 or more.