Strong but thin, this is my favorite stabilizer for making cloth dolls and characters.  It gives body to your stretchy fabrics, but it’s thin enough to minimize bulk which I appreciate when it’s time to turn small parts inside-out.

This is the brand I’m using from Amazon.  I like the low price and the quality is wonderful.  There are more expensive brands out there but I’m not seeing the point unless you’re already shopping someplace else anyway.  I like to buy the rolls, but you can find this in sheets if that’s your preference.