I have a large dog who has large poops. I have been using these bags for three years now and adore them. They are thick enough that they don't tear (and I don't have to feel the gross warm squishy feeling), and big enough to hold all my dog's poop with plenty of room to tie it easily. I've used other bags (they were so flimsy they tore, too small to tie, and I had to use two bags to pick up everything from one poop) - I will never use another dog poop bag again. They are more expensive than other bags but completely worth it.