[header] How to sew a fleece ski mask [title] Use a tape measure to measure the length and width of the ski mask wearer's head. [step] Measure the width around the crown of the head. Measure the length from the top of the wearer's head down to the front of their neck. 
[substeps] Ski masks come in a number of different lengths. Decide if you want it to stop at the bottom of the chin or if you want it to pool at the bottom of the neck.