Rulex® OO HO N and O gauge 150mm/6" British Model Railway Scale Ruler
£9.99
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. 150mm/6" British model railway scale rule.
