La Sportiva size/last consistency

Are La Sportiva shoe sizes consistent througout the years in terms that e.g. Miura in size 42 from 2016 will be equal to Miura in size 42 from 2018?

In my experience with Solutions, yes.

Consistency has been my experience for the last 20 Years or so. 

Mythos, then Testarossas, then Miura Vs, then also Katanas and now Futuras.

All pretty much size 39.

Some slight differences from shoe style to shoe style though. 

Solutions are 39.5, for example

I feel like the sizing changed on the TC Pro's a couple years back. I consistently wore a 40 for my comfy pair (went through several pairs). When I purchased a pair in that size last year, they felt too big. Got a 39.5 instead. My beater resoled 40's fit like my (now also resoled beater) 39.5's. I also think there was a subtle change with the rand. It seems to extend a bit further up the foot (more rand) in the current iteration. Of course, I may be crazy, but I have had many pairs of that shoe, and know them pretty well...

Xan Calonne wrote:

I feel like the sizing changed on the TC Pro's a couple years back. I consistently wore a 40 for my comfy pair (went through several pairs). When I purchased a pair in that size last year, they felt too big. Got a 39.5 instead. My beater resoled 40's fit like my (now also resoled beater) 39.5's. I also think there was a subtle change with the rand. It seems to extend a bit further up the foot (more rand) in the current iteration. Of course, I may be crazy, but I have had many pairs of that shoe, and know them pretty well...

I agree, first TC pros I had were my favorite shoes... all subsequent pairs have been wider across the ball of the foot. They start out OK due to initial stiffness, then become very sloppy fit. This is not a result of choosing a size that's too large, it is a change in width between older and newer ones.

Size consistency also varies a little bit from shoe to shoe in the same model/year as the shoes are made by hand. It's always a good idea to try on a pair of shoes before purchasing them. If they fit funky, try another pair of the same shoe and model. 

https://www.sportiva.com/blog/la-sportiva-factory-behind-the-scenes/?dir=asc&order=user

In general, yes. But as with any handmade item, you can get some variation.

Testarossa's in size 36 were my standard shoe size for years, I've had multiple pairs. Then last year I ordered another pair, same size. And they felt WAAAYYYY tighter, and not just tighter, but they felt like they had couple hot spots, and just wouldn't break in after multiple attempts. (They usually feel tight, but comfortable right out of the box for me, and certainly feel broken in after couple sessions, but this particular pair just wasn't doing it).
After multiple attempts to break them in, a couple of blisters, an e-mail to La Sportiva (the response was basically, you can take them to a resoler to stretch, but it voids all warranty... and oh, we can't take them back since you have worn them multiple times, nothing is torn or broken,  it doesn't appear that there is anything wrong with the shoe), an attempt to stretch them-- failed, because the resoler didn't have the shoe stretcher small enough that it would fit these shoes, I decided that maybe my feet have changed in the past year and I need a pair 1/2 size bigger.

So I ordered a pair that is size 36.5. And they are a touch too big. I'm wearing them, they are generally fine and I have no problem with the toeing/edging, but I feel the air pocket in the heel on heel hooks, and I have never had this issue with size 36.

I now believe that this one pair was just off, and when I get a new pair, it would be size 36 again. Couple people have told me that they had a similar issue with just one pair of  La Sportiva shoes of the exact same size/model over the years, where their standard size shoe was somehow not fitting them, but the next pair in the exact same size was fine again. But there doesn't seem to be a specific timeline attached to it. My friend had an "off" pair of testarossas about 6 years ago, while I had no problems 6 years ago. Another friend had the same issue with Miuras a few years back, but again, not 6 years, and not last year.

I have two pairs of size 42 Muira VS and they fit pretty differently. One is a very snug fit, but the other pair is significantly larger (although they still work fairly well).

I've definitely noticed that there is a difference on one pair of my katana laces, they are about 1/4 size larger than the others. Chock that up to inconsistency being hand made, I'm sure it's just a very slight difference in cut of a section or stitching. 

Some models fit similarly, but I've found a spread across the line. 40.5 tc pro was a slightly knuckled big toe edging fit. A 39.5 in a skwama is about equally tight (for it's last shape, obviously the toes are far more knuckled up in that one). A 39.5 maverink is flat and roomy. 

Recently ordered a new pair of Katana Laces (size 43.5) thinking they'd fit just like my old pair of the same size that I purchased around 2017. The new pair is at least a half size larger and fit pretty poorly. At first I thought it was because of how I had it laced but I couldn't get that dialed, so I laid them sole to sole and the new pair is indeed significantly larger. Not sure if this is a consistent change across the entire line or an anomaly due to each pair being handmade as others have postulated.