Halloween // Need ideas for work trio costumes

Not sure if this is the right place but me have three girls in the office and want to participate In the community/company costume party this Halloween. It’s a big deal for companies to participate.

One girl is rather heavy-set so nothing that would make her feel uncomfortable but also work appropriate. Any ideas? I was thinking Sanderson Sisters?

We did beetlejuice last time but our third girl is new

Please let know if this isn’t the place or a better sub.

Thank you so much!