Vocabulary: looks (aspecto)

What does he/she/it look like? -> ¿Qué aspecto tiene?

Good-looking: atractivo/a, guapo/a
Ugly: feo/a
Handsome: guapo (sólo para hombre)
Beautiful: guapa (sólo para mujeres)
Pretty: guapa, bonita (sólo para mujeres)

Strong: fuerte
Weak: débil, flojo

Edad:
- Young: jóven
- Middle aged: adulto, media edad
- Old: viejo

Talla:
- Short: bajo
- Medium height: estatura media
- Tall: alto

Constitución:
- Thin: flaco
- Slim: delgado, esbelto
- Medium: peso medio
- Heavy: grueso
- Fat: gordo

Ejemplos:
What does he/she/it look like?
He is young. She is beautiful. They are young. We are old. You're medium height.
Mark is good-looking.
He is a handsome man.
You're tall but heavy: eres alto, pero grueso.

Remember (recuerda): Subject + verb + complement
Adjectives before nouns ( adjetivos antes de nombres): adjective + noun.