Ordered myself some bits and pieces from tackleshop.co.uk - a very good and professional service.
I brought a couple of the new Maver ice pellet floats. The weight on them are 4x12 and 4x14; I understand this is how the french weight their floats. I am confused

as most of the floats I use are weighed in grams. I count one gram roughly as one foot - what depth are 4x12 and 4x14. I assummed it was three foot and three and a half foot.
Have I worked this out correctly??

Thank you in advance for any help!