Scenery Catalogue

Every item in the scenery catalogue is a real thing at a real size. The catalogue holds the real-world dimension and converts it to your layout's scale when you place the item:

model size in mm = real size in metres × 1000 ÷ scale ratio

The tables show the result for OO (1:76.2) and N (1:148). Other scales are worked out the same way. Every item can be resized after placing. See Scenery.

Trees and ground cover

Sizes are crown spread: the footprint a tree casts on a plan. A tree is not a standard, so each entry gives a typical mature size and the range real examples fall in.

Item	Real size	OO	N	Real examples
Oak, mature	Ø 15 m	Ø 196.9 mm	Ø 101.4 mm	12–25 m
Ash, mature	Ø 13 m	Ø 170.6 mm	Ø 87.8 mm	10–20 m
Silver birch	Ø 8 m	Ø 105.0 mm	Ø 54.1 mm	6–10 m
Conifer	Ø 5 m	Ø 65.6 mm	Ø 33.8 mm	4–8 m
Young tree	Ø 3 m	Ø 39.4 mm	Ø 20.3 mm	2–4 m
Shrub	Ø 1.5 m	Ø 19.7 mm	Ø 10.1 mm	1–2 m
Hedgerow	10 × 1.5 m	131.2 × 19.7 mm	67.6 × 10.1 mm	1.2–2 m wide
Copse	20 × 15 m	262.5 × 196.9 mm	135.1 × 101.4 mm	Sized to the wood
Pond	12 × 8 m	157.5 × 105.0 mm	81.1 × 54.1 mm	Sized to the water

Lineside structures

Item	Real size	OO	N	Based on
Station platform	40 × 3.5 m	524.9 × 45.9 mm	270.3 × 23.6 mm	A platform two coaches long, at a typical width of 3–6 m.
Station building, wayside	12 × 6 m	157.5 × 78.7 mm	81.1 × 40.5 mm	A typical single-storey country station building.
Signal box	7.3 × 3.7 m	95.8 × 48.6 mm	49.3 × 25.0 mm	24 ft × 12 ft, a common small-to-medium mechanical box.
Goods shed	15 × 8 m	196.9 × 105.0 mm	101.4 × 54.1 mm	About 50 ft × 26 ft, typical of a small station.
Engine shed, single road	21 × 6 m	275.6 × 78.7 mm	141.9 × 40.5 mm	About 70 ft × 20 ft, long enough for a tender locomotive.
Water tower	4.6 × 4.6 m	60.4 × 60.4 mm	31.1 × 31.1 mm	A 15 ft square tank.
Platelayers' hut	3.7 × 2.4 m	48.6 × 31.5 mm	25.0 × 16.2 mm	12 ft × 8 ft, the usual size of a lineside gang hut.
Turntable pit, 70 ft	Ø 21.336 m	Ø 280.0 mm	Ø 144.2 mm	The standard large British turntable.
Turntable pit, 60 ft	Ø 18.288 m	Ø 240.0 mm	Ø 123.6 mm	Common at smaller sheds.

The station building, signal box, goods shed, engine shed, water tower and platelayers' hut are buildings. Buildings are checked against one another and can never overlap.

Roads, bridges and civils

Item	Real size	OO	N	Based on	Ground
Road, two-lane	20 × 7.3 m	262.5 × 95.8 mm	135.1 × 49.3 mm	7.3 m is the standard British two-lane carriageway.	Stands on it
Level crossing	12 × 7.3 m	157.5 × 95.8 mm	81.1 × 49.3 mm	The same carriageway carried across the railway.	Spans
Bridge deck, road over rail	12 × 8 m	157.5 × 105.0 mm	81.1 × 54.1 mm	A deck carrying a two-lane road with footways.	Spans
Tunnel portal, double track	9 × 3 m	118.1 × 39.4 mm	60.8 × 20.3 mm	The face and wing walls of a double-track portal.	Spans

Items that span pass over the ground, so track running beneath them is expected and is not reported. See Standing on the ground, or spanning it.

Worth knowing

• One foot is exactly 4 mm in OO. A 70 ft turntable pit is exactly 280 mm across and a 60 ft one exactly 240 mm.
• These are real-world dimensions, not kit sizes. Nothing here is any kit maker's product. A particular kit of a signal box may be a little different from 24 ft × 12 ft; resize the item to match the one you are building.
• Lengths are yours to choose. Roads, platforms and hedgerows are placed at a sensible length. Resize them to suit.