All depends on your perspective

Wiktionary:
petite - Of a woman, fairly short and of slim build.

From a modeling blog:
Petite - This is a misunderstood term. Generally speaking, large agencies look for talent to be 5'9" or taller because that is what is needed for fashion and runway. There is a smaller market for petite models, but there are opportunities for them with agencies. A petite model is normally one who is 5'6" to 5'8". In addition to fashion, petites often find work in the commercial area. A model shorter than 5'6" is considered sub-petite. Sub-petites have the greatest opportunity in glamour and body modelling.

I just assumed that it's a YMMV descriptive term in this hobby, just like "GFE".  This is where accurate pictures become essential for truth in advertising.

I'm 6-3, 300+ lbs...

Most providers are petite...

Although I've seen pictures of some girls are bigger that the defensive tackles I used to beat on!

Perfect example of PETITE!!!

Cecilia and Noel North are perfect example of true Petite....I saw both of them and they were so freakin hot and true MILFs..lol

My take on petite

I think you have to consider women's averages. Not scientific but my belief would be 5-4, 110 pounds (maybe 115 depending on bone structure) would be the maximum to be considered petite

I'm 6'2 220lbs and bench-press 300lbs..... and to me.... petite is....

a *slender* lady under 5'3 or so, with the Ideal being a delicate Asian lady of 4'8 to 5'2 at 100lbs or less.

That being said, I love *slender* (let's define this as a size 0 2 and maybe 4) as well - at any height. I enjoyed a delightful interlude with a lady of 5'10 and 120lbs not long ago.....

I also love *athletic* when it *really* means Athletic and is not a euphemism for "on the way to BBW" lol.....

I am 6'4'' and Petite is....

Anything less than 5'4'' and 115lbs. However, I have had the 5' real girlfriend that weighted under the 100lbs and it was fun, but I prefer the 5'10" and taller with a true athletic build. If she is 6' or more the better. I stop at 6'4" up to what I can safely pick-up.