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Don't use a pasted strop yet. They are used to touch up an edge that has dulled from daily shaving to the point where regular stropping won't recover the edge but not so dull that the razor needs to...

My hanging strop is 20" long and I generally need 30 - 60 strokes to keep my edges keen. A 12" long strop will require more strokes to provide equivalent stropping effect as a 20" hanging strop.
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