These are the switch plate covers I have made to look like clouds or bubbles. I have the bestseller badge for these in my Etsy shop, they sell really well! I wouldn't charge less than $6 for the small ones, and I would add $1 at each next size.

Below are the settings I used on my Bambu lab printers.

.20mm Standard Quality Arachne Wall Generator 6 top shell layers No Brim