MSC Model 18x24 acrylic sketch 10/22/13

I thought I might start painting bigger in case I ever need bigger pieces. I wonder why the larger acrylic canvas paper does not come in standard frame sizes. I have 12x18 and 18x24 paper. Standard frame sizes if I would choose to mount my pictures on mat board to frame are 16x20 and 20x24.

Milwaukee Sketch Club is exhibiting at Clement Manor and the preferred size is 16 x 20. I decided not to exhibit as my plein air pieces are too small. However, on November 12, we're having an artists' reception and the food is very good there. Plus if we want to, we can sketch the residents. I'm going to try marker next week at sketch club and see how that works.