Well, I forgot to take pictures along the way, but you’re in luck because quilted picnic placemats are much the same as regular placemats with two exceptions. Mine measure 15×18″, and are machine quilted and bound. You can, of course, use pre-quilted fabric cut to size but I didn’t have any of that in my stash.
Thing 1: A set of 2 ties sewn into the edge of one side. You can see from photo above that the ties are about 1/3 of the way up one side. I placed them here so I could fold over the top of the placemat to keep the utensils in place. That way you fold over the top, roll it up, and tie it closed.
Thing 2: A small divided pocket for aforementioned utensils to slide into. I stitched my pocket so two edges are under the binding (thus saving me from finishing two additional edges!). I believe my pocket piece measured 5″ x 12″, folded in half WST and stitched down on one side so I had two finished edges (the fold and the stitched edge – the fold is on top in the picture, and the stitched edge is the left side of the pocket). I trimmed the corner, flipped it right side out and stitched it down. Then attached the binding on top of it.