Inner Head Tubing - Cotton Stockinette
Stockinette tubing is a little heavier and thicker than the gauze, and you will only need one layer. You will need a half yard per doll.
Need more? Order an entire roll for lowest price.
The widths are somewhat nominal. Depending on the roll, tubing may come a little wider, but will still have the same amount of crosswise stretch for the correct doll head sizing.