AIRSUNNY100 Pcs 4x6 Resealable Cello/Cellophane Bags Good for Bakery, Candle, Soap, Cookie Poly Bags €¦

Will these work to hold handmade cards?

Are these biodegradable?

I have a paper I want to insert in the bags that are 5" tall. Will the bag be able to seal? How far up is the resealable part?

Would these be the correct size for popcorn boxes that measure 3.75 × 5.5?