Measuring your Frenchie requires a bit of an effort, but it ensures that perfect fit and they'll certainly love you for it. We encourage you to reference both charts.
by body weight
How to measure your frenchie
Allow your frenchie to naturally stand straight while you take these measurements.
Measure all the way around the biggest part of your frechie's ribcage, generally just behind the front legs and back up the withers.
Measure all the way around at the place where your frenchie's collar would naturally rest - from about the top of the chest to just above the withers.
Measure your frenchie's back - along the top of the spine from the withers to the base of the tail where it joins the body.