The smallest made & they are a S-point is size#21,I do stock the 7x3 in a round point in sizes #19,20,21,22,23 which some people use when using thinner thread.You might consider getting a smaller upholstery machine like an old Singer 111w or something & keep it setup for thin leather.It will take some adjusting on the Outlaw to get the tension right & they when you go back to thick thread you'll have to re-adjust.