Does it come in other sizes?

Currently the Zirkel is available in one size: 4"x4"

What colors is it available in?

Black, Green, Turquoise, Pink, Purple, and Red

Is the Zirkel safe to use around my sewing machine, computer, and other electronics?

Yes..newer electronics make the difference

(If an older machine uses floppy disks, be careful with the magnet.)