There were a few that would not cinch up and I couldn’t figure out whyI got these to use as filter media bags for my Fluval Evo 13.5. I used 22oz of carbon and got 15 bags 3 are in tank sump. These fit perfect in the Fluval sump.Great, exactly what i wanted.Bought this for a friend and they loved itThese were the perfect size for wedding confetti!Disappointed the bags were dirty it looks like they were used.My secret weapon when it comes to using these sheer mesh bags....is Gain Fireworks Scent Booster. I place a small amount inside and place them everywhere (closets, dresser draws, underneath my SUV seat). The scent last for weeks and my home atmosphere is so inviting. Whenever I have a visitor they are driven crazy because they are unable to figure out how I keep my home smelling so great. The bags are the correct size for my booster beads and they are definitely mesh. The problem I experienced was half of my bags arrived with strings missing or hanging off by just a thread. The strings are important to my DIY because I do not want these tiny beads falling all over the place. On the other hand, since I paid less than five dollars for the bags, I will just chalk it as a loss and take my business elsewhere next time. I appreciate you for taking time out to read my review. I hope you found it informative.I used them to put shredded "Irsh Spring" soap in, helps to keep mice out of our travel trailer and truck for winter storage. My wife used some for special coins as gifts.