I made rice bags, used a towel and we heated in the oven, no microwave, I have no idea how long though, I was a little busy trying to concentrate on what I was doing

Probably about the size of a regular keyboard, 6x18 I just used rice nothing else, We used them w/ the 2nd to keep him warm, January baby, I used them after both births as cold packs, stuck them in the freezer and got them cold, put them in plastic bag so they woudn't get blood on them and wrapped thin sheet material around and used down there, oh that was nice, my SIL, had her son in hospt. and she said they took a pad and ripped it open from the underside and put ice in it, so may want to make an extra one and have it cold for after.
I couldn't pee w/ the 1st and in trying to stay away from a catherter the midwives had me smell Dr. B's peppermint soap, they said peppermint would mke me want to pee, didn't work though...