Our Peel and Seal Glassine Envelope Bags are all made from 60gsm glassine paper which has a glossy, smooth finish. Glassine has natural grease-proof qualities but no barrier for moisture. Glassine is made with virgin pine cellulose. 30 glassine bags in each pack. 65x65mm (2.55″x2.55″) 60gsm Glassine Peel and Seal Pockets or Packets. Manufactured in the UK. A way of replacing pointless plastic packaging of the same size. Although glassine is not waterproof it is far better for the environment than plastic as it is biodegradable and recyclable. Used for seed collecting and packaging, samples, photographs/negatives and much more including tiny mechanical parts and components to artisan soap and confetti.