They are almost 9" diameter and have a bit of depth to them - not as deep as bowls, but a slight elevated rim. 

H.B. & Cie - Hautin, Boulenger, & Cie from France. There are various backstamps which means this set was likely collected over time. 

"Terre De Fer" 

"5 of Paris" 

"Choisy-le-Roi"

"H Boulenger & Cie"

"Articles Sanitairs Faience d'Art Revetements"

These go for about $200 each if you look at Paris stores. 

NOTE:  I also am listing 4 matching 9" soup bowls. See my store.