We do need to know if cut out will be required in the top(s) you intend to use in your installation. This could be a sink cut out or maybe a cook top. You may have 1, 2 or 3 cut outs in each top...or none at all. It is up to you. At this time we do not need to know the size, only the number of cut outs. Please know that while we will cut for under mount sink installations we do not warranty these types of tops.