With a track gauge of 16.5 mm and a scale of 1:87, HO is the most common model train size today. Lionel has manufactured HO trains several times in its history.
Where scale represents a model's size compared to the real thing, gauge. sharper than those in real-life which often lends itself to a more toy-like appearance.
On the real railroads as well as toy trains, Gauge refers to the distance. Lionel O
Pennsylvania Flyer LionchiefÂ® 0-8-0 Freight Set with BluetoothÂ®. SKU:683984. MSRP: $299.99. O Gauge icon. Add to Cart .