Does anyone know if the size of the letters can be enlarged/reduced, or is there only one size option for letters?

You probably need to check your manual. I have a #1Plus and certain letter styles can be enlarged.

Yes, I think you can re-size the letters but I don't recall exactly how it's done. Check your manual.

I have the Sapphire 870Q and you can't change the size on it.

I have a Viking Lily and you can't enlarge...Also on my Husq Viking SE can't enlarge

I have this same machine and I'm sure I have enlarged the letters in the past. You can't enlarge them too much, but I'm sure I have done it. I'll check when I get home tonight.

Thanks! I have only seen them at the one size, so I was wondering if anyone ever did this...

I checked last night. You can change the width and make it smaller, but not larger. It brings the letter in at the maximum height. Hope that helps.

What kara said ;) 7mm max height on all stitching.

I have this machine as well and the size of fonts for the alphabet stitching can not be changed. :(