We have a rug the same size as the underlayment 10x13’. So, to make trimming the sides by roughly 2” to lay flat a little easier, we took frog tape (painters tape) roughly 2” wide and ran it down each side and just cut it with scissors using the tape as our guide. About as straight as could be and very quick.The rug itself is thick enough for our purpose, the materials seems to be of good quality for what if is. I would recommend buying this if you are looking.
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