Here's a description of his appearance:
* Height: Average height, likely around 5'7" or 5'8" (1.70m - 1.73m)
* Build: He was described as thin and wiry, with a slightly hunched posture.
* Hair: Miró had dark hair, which he often wore neatly combed, but it sometimes became unkempt, especially in his later years.
* Eyes: He had dark, expressive eyes.
* Facial Features: Miró had a long, thin face with a prominent nose.
* Dress: Miró was generally seen in simple, comfortable clothing, favoring suits, shirts, and trousers, usually in muted colors.
While he wasn't particularly known for his looks, Miró's personality and creative energy were often expressed in his expressive eyes and his quiet intensity.
You can find many photographs of Miró online, which will give you a better idea of his appearance.