I need a script to scale multiple layers to the same size all at once.
I thought i saw one here before but using search i could not locate it.

Does anyone know how to write one to do this or is there one out there i missed?

Thanks folks.

If the layers are chained and you use the scale tool, they will be scaled together.

Yet another "tell me hat you need, and I'll show you how to do without it"

Menu location layer/Scale Linked Layers

Sweet! You even added scale from center.
Thanks Graechan.

Ofnuts thanks for the information on scaling linked layers.I learn something new in Gimp every day.

Rod I made a mistake that I did not notice until after I posted I spelled RGB* RBG* in the menu if your copy has this error you can re download or fix

Thanks for letting me know Graechan.I ran the script on a RGB image before fixing and it ran fine.
Awesome script and it will be very handy.

I tried it in Gimp-2.8.4 (Parthas install) and it worked for me.
I made one layer, duplicated it 4 times and linked 4 layers and scaled proportionately and it scaled all the linked layers.I love the script you wrote better though Graechan as it scales from center.
I don't know why Gimp doesn't have this setting default already.

This actually applies to all geometric transforms (rotate/scale/shear/perspective/flip...) and applies to channels and paths that are linked as well... (so you can keep a layer, a channel, and a path in sync...).

I am thinking it must be your version Graechan as it worked for me in Parthas version.

Is there a way to remove the Linked part of this? I am working with about 2000 layers and I dont want to have to link each and every layer individually since that is tedious....

Before I finished typing this I looked at the code and figured out I just had to remove an if conditional to accomplish this I shall share the modified file (hopefully the credit change I made is appropriate if not let me know).

EDIT: I found a bug that I need help fixing since I am not familiar with the syntax of script-fu (im really only familiar with c++ and java so I was able to figure out the above but not much else). I was scaling all of the layers up to 2000 px by 1 px and the one layer that already had that width messed up and increased to 3000 px by 1 px instead of being skipped since it was already the correct size. I assume I just need to add an if conditional into the while loop that says "if (get-width = new-width) then (if (get-height != new-height) then (scale-to-new-height)) else (if (get-height != new-height) then (scale-to-new-height-and-new-width) else (scale-to-new-width). Thanks for any help

You can try holding down shift key and click the link to turn them all on or off.