Steve is correct, check Shaw & Tenney but choose a slightly short pair. In other words if the formula says 7', buy 6.5'. The reason for this is that the oarlock holders on a sneakbox are close to the water compared to a rowboat of similar beam, so a one size formula calculates a slightly long oar for a sneakbox. The longer oars end up almost horizontal when feathered and hit you in the knees or drag in the water.