The standard weight of paper used for CD booklets at Blue Pro Media is 150gsm for 4 page booklets or 150 gsm. For booklets of more than 4 pages the outer pages will be 150gsm with inner pages at 90gsm. The weight and feel can be altered by increasing the board gsm or the type of paper itself. There are certain limits depending on a number of factors, principally how many pages the booklet will contain and whether too greater thickness will prevent packing into the required packaging. Of course, as you increase the weight of board, so the cost increases. Please ask for a custom quote if you have a specific requirement.