The large size is great for about 5oz with enough room to easily tie a knot. You could add a couple more oz if you want to take the time to heat seal, but a 5oz ice pop already feels like a bit too much for one sitting.There was a bit of getting used to tying them off, as I had never made them before, but by 3rd batch, they look uniform and full. The first couple were a bit floppy and misshapen, but that didn't stop everyone from sucking them down.Easiest ice pop recipe ever: 1 packet Kool-Aid (unsweet), 1 pack Jell-O 3oz, add 1/2c sugar.add 2 cups HOT water to dissolve everythingadd 2 quarts warm water and stirfill 5oz in each and tie offTurn freezer to HIGH, and place in coldest part of freezer (the faster they freeze, the softer the ice. don't forget to turn down the freezer once you are done freezing them)makes around 20 large pops