boot/liner sizing

[dshack]

My understanding of liner sizing is that a shell is usually built to take either a full-size or half-size liner, with full-size liners being bigger to take up more volume. Carver's Almanac basically says that .0 and .5 sizes of Head and Raichle boots tend to use the exact same shell size.

"Manufacturers vary the "size" of the liner either by making the liner bigger/smaller, or by changing the thickness of the footbed. For instance, if the lower shell is stamped with "27-27.5", then the boot can be either size 27 or 27.5, depending on the liner size. There are 3 possibilities:

• The exact same liner and footbed are used for both 27.0 and 27.5, in which case the two sizes are actually the same size: they are both size 27.0. This is the case for later models of Raichle boots.
  
• The liner for the 27.0 boot is thicker, taking up more room, but the footbed is the same. In this case, the size 27.0 really is smaller, but only if you use the liner that takes up more room. The 27.0 boot fits foot lengths of 27.0 to 27.49999 cm, and the 27.5 boot fits foot lengths of 27.5 to 27.9999 cm.
  
• The liners are identical, but the 27.0 liner has a thicker footbed that takes up more space. In this case, the size 27.0 really is smaller, but not really, since you will be throwing away the footbed and using your own custom molded footbed. As a result, the two different sizes are unintentionally the same. This example applies to Head Boots."

If I'm reading this right, and I measure a 24.2, I should have no problem using 24.5 boots with 24.0 liners, right?

[BlueB]

No firm rules there... Shell shape/width varies from brand to brand, as well as liner density. Even the sizing seems to be a bit different.

I mesure 26.5.

With Nordicas 26.5 with 26.5 liner, felt tight in the beggining, then too lose when liners packed in.

LeMans 26.5 with 26.5 liner just felt too big, yet too narrow forward and mid foot, while too wide at the heel alowing lots of heel lift.

Lange 26 with 26 liner are snug but a bit too narrow.

Dalbellos (Head) 25.5 with 26 Nordica liners are good, just a tad too narrow up front.

AF 700 26.5 with 26 liner is kinda ok, but didn't try riding in them yet...

SB 325 26.5 seem to be just as bad as LeMans.

This is just me and my shape of the feet...