Roblox UDim

Working with roblox udim for the first time usually leads to that classic "aha!" moment when you realize why your UI looks perfect on your monitor but completely breaks the second you test it on a mobile device. If you've spent any time in Roblox Studio, you've probably noticed those four little numbers in the Properties window under Size or Position. They look simple enough, but they're actually the secret sauce to making a game that looks professional across every single platform, from a massive 4K curved monitor to an old iPhone. ...

January 23, 2026 · 6 min · Marnie Labedz