Very attractive horse but, has many ambiguous things shown. I the 3rd picture he looks like a young horse but, in other pictures the long tail and main looks as a mature horse. If you can square up the horse and give us more information it would help. Still he is very nice looking .
I have some reservations about her build, but with pictures also being what they are commenting is not fair to the animal.
Please, pictures done as conformation ones with the horse stood up square, both sides, mud knot that tail so leg and hind-end are seen clearly and if possible band that mane together for the pictures so neck structure is seen....and a front view of head, chest and legs is needed.
Do Take a side profile of your horse. Place your horse's entire body, including its head, at a 90-degree angle to the camera. This, and standing your horse on level ground, will ensure that its proportions appear accurate in the photo. Consider banding, braiding, or combing your horse's mane...
Some other resources that give commentary and pictures for seeing what is seen and why..