I use the 10 oz ones and they hold approx. 9 ozs depending on how full you fill them. I've never used the 7 oz so have no idea on those. I like the look of the 10 oz and I use the plastic dust covers on these and clear labels, they look spa like, good sellers for me. I get mine for .83 a piece buying them in lots of 72 and I fortunatly can pick these up so I save a bit by cutting out the shipping cost and replacing it with gas money but I get them at the same place I get my wax from so I definately save $ without having shipping costs. Sandy