Change automatically the width of items

Hi everybody

I have bought plans of a forniture, but I find out that most of the sizes are 18 mm width and I could buy 20 mm, as 18 mm is much more expensive and harder to find.

Is there any way to select these components or pieces all together and change them the width automatically or they have to be resized one by one?

Thank you in advance for your kind answers

It’s difficult to say without seeing the SketchUp file. I expect you won’t be able to make the changes to all pieces in one step. Depending on how the model is created and where the additional thickness is added, you may have to also adjust length or width of joining pieces. If the model was made correctly, the adjustments should not be difficult but again, without seeing the SketchUp model, it’s impossible to say more.