Hi! I was curious as to what kind of interfacing do you think works best on skirt waistbands? and shirt collars/cuffs? What kind did you use for your heart cut-out dress?
I use light- to mid-weight interfacing, usually in 3 yard packages from Pellon. It's fusible, non-woven, machine wash. It does depend on your fabric, though! Use lighter weight interfacing on shirts than on waistbands, too! Hope that helps!
