The picture shows a view of all (6) Colorful Old Enameled Ski Advertising Pins in this lot. These advertise different ski resort locations. They were most likely purchased at the locations as souvenirs from skiing trips. They are marked as follows:
ASS'N. CANADIENNE CANADA DE SKI AMATEUR
MT ORFORD (Canada)
STOWE (Vermont)
SKI ENCHANTED MOUNTAIN (Maine)
KILLINGTON VERMONT
SUGARLOAF USA (Maine)
To judge the sizes the first pin measures 1-5/16'' x 1-5/16''. These are all in mint condition as pictured.