Here is a nylon Apana bag that belonged to my wife that she never used.  It has all kinds of compartments inside.  The exterior is dark blue in color and the inside is blue also.  From my best measuring, it looks like its 19 inches tall by 17 inches wide.  Pictures should tell you a lot about the condition of the bag.  Thanks for looking good luck and happy bidding.  Payment within 5 days please.