Gundam Scales Explained: 1/144 vs 1/100 vs 1/60

The fraction is a ratio to the mobile suit's in-universe height. A kit at 1/144 scale is built at one 144th the size of the full mecha as described in its show or game. A kit at 1/60 is much closer to full size on paper, one 60th, which is why it ends up so much taller in your hands.

Most mainline Gundams are written as roughly 18 meters tall, and that number is what the scale math runs against. A taller mobile suit like some of the bigger Unicorn-era or Turn A designs will come out taller than a standard kit even at the same scale, so scale tells you the ratio, not a fixed height. Treat the numbers below as the useful average, not a law.

A standard 18 meter Gundam at 1/144 lands around 5 to 6 inches tall once built. This is the scale HG and RG both use, which is part of why a Real Grade and a High Grade of the same mobile suit sit at almost identical height on a shelf even though the RG usually has tighter proportions and more internal frame.

1/144 is where most people start and where most people stay, because you can fit a real squad of kits in the space one MG would take. If you are building a whole faction, a battle diorama, or just do not have a dedicated display case yet, this is the scale that scales with your space, no pun intended, but it is true.

1/100 kits (mainly MG, plus the RE/100 line) run about 7 to 10 inches for a standard-height mobile suit. That jump from 1/144 gives designers more physical plastic to work with, which is why Master Grade kits can pack in inner frames, opening hatches, and panel detail that a same-price HG cannot physically fit.

The tradeoff is obvious once you have a few on a shelf: an MG takes up roughly the footprint of two or three HGs. If your collection is mostly 1/144 and you want to feature one or two hero units at a noticeably bigger, more detailed build, 1/100 is usually the jump people make first.

1/60 is Perfect Grade's scale, and a standard Gundam here comes in around 12 inches tall, sometimes more depending on the mobile suit. At this size the kit stops being a shelf piece among many and becomes a centerpiece on its own, often with full internal frames, lit-up gimmicks, and a part count that turns a build into a multi-day project.

Think about clearance before you commit. A 12 inch kit needs real vertical room, and depending on the mobile suit's proportions (backpacks, wings, weapons) the footprint can end up wider than you expect too.

HG and RG share 1/144. MG sits at 1/100. PG sits at 1/60. That covers the vast majority of kits you will run into. Where it gets messier is SD, which drops scale accuracy entirely in favor of a chibi, oversized-head style built more for cost and character than any real ratio, and EG, which is 1/144 but built to a simpler, cheaper engineering standard than HG.

So grade tells you about engineering complexity and price point, while scale tells you about physical size. They correlate strongly (higher grades generally mean bigger scale) but they are answering different questions. If you want the deeper breakdown of what separates HG, RG, MG, PG, SD, and EG on build complexity, that is a separate guide worth reading before you commit to a grade line.

Mixed-scale shelves are common and fine, but they read as intentional when you group by scale rather than scatter kits randomly. A row of 1/144 kits next to each other looks like a matched squad. Drop a single 1/100 in the middle of that row and it can look like an odd size jump rather than a deliberate feature piece.

A rough rule that works for a lot of builders: use 1/144 for anything you want in volume (full mobile suit teams, rival factions, army builds), reserve 1/100 for units you want to stand out with more detail, and save 1/60 for the one or two mobile suits you actually love enough to give a dedicated spot to. Measure your shelf depth before ordering a PG especially, since the box art rarely makes clear just how much space 12 inches of Gundam actually needs.