Rulex® OO HO N and O gauge 300mm/12" British Model Railway Scale Ruler
£11.57
It has the four most popular British railway scales (one along each edge). An average height person (5'9") is shown against each scale to help with scaling. Side 1 - OO gauge 1:76 4mm to 1ft. Side 1 - HO gauge 1:87 3.5mm to 1ft.
