The ascent plates are made from .090” anodized aluminum and weigh 380g/plate. They are approx. 13-1/2” long, 7-5/8” wide and ½” thick including the side rails. They are designed to fit most popular step in/hard boot crampons, and a soft boot version is also available. If you are unsure about fit send us an email with details on your crampons and we will advise on fit. The plates are designed to accommodate boot sole lengths of 280-335mm.