What size are these pearls, in your opinion?

[Pearl1]

I'd like to try to match these exactly, so an expert opinion would really be appreciated. Thank you!

 

[Pearl Dreams]

I assume you don't have them in hand and can't actually measure them.

They look to me like 6-6.5mm akoya pearls (or imitation.) They are round so there must be a bead inside.
Google "6-6.5mm pearls", look at images and see if you agree.

 

[Pearl1]

No, I don't have them - it is an old photo. I also would have estimated 6-6.5mm. Thank you very much for your input.