1:18, 1:24 or 1:12? A Complete Diecast Scale Guide
If you only take one sentence away from this diecast scale guide 1:18 vs 1:24 vs 1:12, take this one: 1:24 is the sensible shelf-friendly choice, 1:18 is the sweet spot most collectors settle on, and 1:12 is the display-piece scale that turns your car into the centrepiece of a room. Everything else is nuance, and this guide walks you through the nuance so you can commission the right replica of your own car with confidence.
At Roys Diecast every model is built one at a time from four to six photos of your actual vehicle, so the scale you pick shapes not just the size of the finished piece but how much of your car's character we can physically reproduce. Below, we compare the three scales on size, detail, price, weight and where they belong in your home.
The quick answer
- 1:24 (from GBP 69) - roughly 18-20 cm long. Great for desks, bookshelves and gifts. Captures overall shape and colour beautifully.
- 1:18 (from GBP 129) - roughly 24-28 cm long. The collector's default. Opening bonnet, opening boot, full interior, rotating wheels.
- 1:12 (from GBP 199) - roughly 36-42 cm long. A statement piece. Engine bay detail down to the oil filter and coolant lines, gear knob you can read.
Ready to skip ahead? You can start your build on the order page and pick the scale during checkout.
What "scale" actually means
A scale of 1:18 means one unit on the model equals eighteen units on the real car. So a 4.5-metre saloon becomes a model 25 cm long. The smaller the second number, the larger the model - which sounds obvious once you say it out loud, but it trips up plenty of first-time buyers who assume 1:24 is bigger than 1:18.
Scale also dictates what a workshop can physically build. Below a certain size, features like a working bonnet catch or a stitched-look steering wheel simply cannot be reproduced by human hands. That is the single biggest reason a proper diecast scale comparison matters before you order.
1:24 - the everyday scale
Size and feel
A 1:24 model of a typical family car sits at around 18-20 cm long and weighs a few hundred grams. It fits comfortably on a desk beside a monitor, on a mantelpiece, or inside a standard glass cube display. It is also the easiest scale to post as a gift.
What we can reproduce at 1:24
At this model car scale size we build the composite body over a metal alloy chassis, match the paint to your car's exact factory colour, and fit rotating wheels with correct rim design. The bonnet and boot stay closed, and the interior is moulded and painted rather than fully detailed. That is not a compromise so much as an honest fit for the scale - trying to open a 1:24 bonnet with hinges that actually work tends to look clumsy in the metal.
Who it suits
1:24 suits gift buyers, first-time commissioners, and anyone with limited shelf space. It is also the scale we quietly recommend when the donor car is a small city car, because the larger scales can start to look toy-like on very short wheelbases.
1:18 - the collector's default
Size and feel
1:18 is the scale most collectors mean when they say "a proper diecast." A saloon lands at roughly 24-28 cm long, an SUV a little more, a supercar a little less. It has real heft in the hand - enough to feel like an object, not a toy.
What we can reproduce at 1:18
This is where the workshop really opens up. Opening bonnet with engine bay detail, opening boot, opening doors on most body styles, rotating wheels with correct offset, and an interior detailed down to the gear knob, dashboard dials and seat stitching pattern. Paint is still matched to your car's exact factory colour, and badges are applied rather than printed where the geometry allows.
Who it suits
If you are torn on 1:18 vs 1:24 size, and you have a shelf that can spare 30 cm of depth, choose 1:18. It is the best scale for custom diecast for the majority of our customers because it balances presence, detail and price. Most of the pieces you will see in the verified customer reviews - 50 reviews at a 4.9/5 average across ten European countries - are 1:18 builds.
1:12 - the statement piece
Size and feel
A 1:12 model of a modern estate car pushes past 40 cm long and weighs enough that you handle it with two hands. This is furniture-sized. It belongs on its own plinth, on a wide sideboard, or inside a bespoke cabinet - not squeezed between books.
What we can reproduce at 1:12
Everything 1:18 offers, plus the details that only become physically possible when parts are large enough for a human to shape by hand. The engine bay reads correctly down to the oil filter and coolant lines. Interior switchgear takes on genuine texture. Wheel construction becomes multi-part rather than moulded. If your car has a feature you love - a specific badge, a bonnet vent, a particular alloy design - 1:12 is where it will be most faithfully reproduced.
Who it suits
1:12 is for the car you would never sell, the milestone car, the retirement build, or the tribute piece to a vehicle you no longer own. It is also the scale to choose when the model itself is the gift and space is not the constraint.
A workshop-honest diecast scale comparison
To round out this diecast scale guide 1:18 vs 1:24 vs 1:12, three practical points that rarely make it into marketing copy:
- Lead time is the same. All three scales take 7-10 business days from production start. Larger does not mean slower on our bench.
- Photos matter more than scale. Four to six clear photos - front three-quarter, rear three-quarter, both profiles, interior, and one of any unusual detail - beat any number of extra pounds spent stepping up a scale.
- Shipping is included across the UK, Germany, Spain, France, Italy, Netherlands, Belgium, Portugal, Austria and Switzerland. EUR prices auto-convert at checkout for EU visitors.
Once you have chosen your scale, the rest is straightforward: head to the order page, upload your photos, and we will confirm your factory paint code before a single panel is cast.
Frequently asked questions
The questions below cover what we hear most often once someone has picked a scale but not yet placed an order.