They are certified home compostable and biodegradable. This new Big Pack paper box includes 3 small rolls of each 25 bags, size 20,5 x 28 cm, a total of 75 bags. The Maistic 2.gen bags have biobased ingredients, e.g. corn starch from organically grown, GMOfree corn and PHA compostable bioplastic from upcycled food scraps.