Dash Pro - Core Size for tips



I’m thinking of buying some Comply tips for my Bragi Pro and wanted to get their new variety pack (iso, sport and comfort) so I could try the different fits.

I have very little experience with “in-ear” and I’ve been finding the different sized sleeves and tips either too loose or painful; so I was hoping to try a wider variety of fits.

They are selling these tip variety packs based on the “core size” of the earphone and don’t list bragi’s in their website database. Does anyone know the appropriate size? It ranges from 100-500.

Thanks very much,