This is a fairly common form of bench that most people associate with Shaker furniture makers. Usually, the apron (side) boards are nailed into the legs and top board which makes for a quick assembly and a fairly strong bench. Over time and with use the nails tend to work loose and new ones will have to be set.
The bench is 18” tall, 32” long, and 9” wide at the seat. To build this bench, I cut a notch into each leg the width of the apron. Then I cut a channel into the back of the apron the hold the leg. I added a few screws (covered with plugs) to hold the parts together. The top is attached with figure-eight washers. The bench is finished with two coats of light-blue milk paint and then buffed with clear wax.