Best vibe for the sqweevee sqweel case

I've been looking for a vibe to work with this for ages. Out of all the vibes I own none of them fit, they are either too wide or far too thin.

So I'm wondering which vibe people would recommend. I know the smoothie can fit but I'm really unsure of the colour, think I've seen it in pinkk or green on LH. I know I shouldn't be fusy about colour but for some reason certain colkours can put me off a toy.

I've had a look through the classic vibe section and again most are pink. I liked the idea of a metal looking one but these also seem too big... so I'm a little stuck.

Also is there a search by girth option? I may have missed it is there is.