My rendered .gif has different size than in Synfig

Hello everyone, I’ve been trying to make a gif but here is the thing. When everything looks nice in Synfig, I render the file to a .gif but the resulting .gif is bigger and more pixelated, like if you stretched it.

Here’s how it looks:

Did you set width & height the same as your original file before rendering?

Yes, Canvas → Properties → Image has Width and Height at 500

Render → Image also has Width and Height at 500

Here’s a related post I found out googling about magick++ (used to render gif image):