I am assuming that you are referring to an electric guitar. My vision isn't the best, so pardon me if I have made an error.
Be aware that some of the smaller electric guitars utilize a non standard tuning. Getting a guitar that tunes using the same tuning as everyone else would be a terrific advantage.
A good friend of mine was looking for a small guitar for his nephew. I think he ended up with a Strat copy with a 22" scale. I forget the brand, but I think it was listed at Musician's Friend.
Allegedly, this guitar tunes with the standard E tuning that most of us use and for which all guitar lessons are written for.
Going to Musician's Friend's website and typing in "22" scale, Strat" might lead you to the instrument.
The SX short scale Strat clone (Rondo Music) might also be an acceptable instrument. I am satisfied with my SX instruments.
I "think" the short scale SX Strat utilizes a 23" scale, which is 2.5" shorter than a standard SX Strat. In spite of their low prices, these instruments are not toys or junk.
Good luck.