I think I'm getting close to understanding this, I probably should have paid more attention in geometry or maybe algebra 2... If I understand this correctly, using the ratio 1-3-5 for a WWI roundel and the roundel is the diameter is 78mm, the dimensions would be 15.6-46.8-78 (16-47-78)? I'm presuming the red is the one, the white is the 3, and the blue is the 5