You want the material to have the same diameter the whole way through. Most modern printers use 1.75mm filament so you want the filament to be as close to that as possible. To measure the accuracy, I take a 5-meter piece of filament from the beginning, middle and end of the roll and measure the diameter at four equally spaced points. Her cozy look uses a quirky, moss green wig which she bought on Amazon, is quite whimsical and although it’s not thematically accurate, it totally goes with her fluffy coat.