These are the same masks that the riders wore on their charity ride this summer, which was a relay across the US. They are made by one of the riders, who is a costume technician.
Available in small through extra large. If you have a beard, be sure that the size you choose accommodates it. Measurements for the sizes given are of the mask itself, and it does not necessarily need to go all the way from ear to ear. Across the mask is the 1st measurement, from ear to ear. The 2nd measurement is from the bridge of the nose down over the mouth to below the chin. The third is vertical, in front of the ears, where the pleats are all stitched down.
S: 7.5″, 6.5″, 3″
M: 8″, 7, 3.5″
L: 9″, 7.5″, 4″
XL: 10″, 8″, 4.5″