Dimensional Dementia

I got myself a passel of 5 x 7 inch panels thinking I might churn out some painting studies. Hey, I certainly have no troubles with drawings and watercolors at that size, and there are plenty of daily artists who work even smaller with impressive results. But I'm either picking lousy subjects or lack the finesse- it feels like I'm building a ship in a bottle with fireplace tongs. The dog paintings are just 8 x 8 inches, but somehow going down to 5 x 7 inches crosses out of my comfort zone. I think I need to do a couple of 18 x 24 inch paintings to settle down.