Jotuns

Jotuns, also known as the Frost Giants are a race in the series, Thor and the Marvel Cinematic Universe. They live on the planet, Jotunheim and are led by Laufey. After the Asgardian-Jotunheim confict, Odin found a baby Frost Giant, and was considered quite small for one. So, Odin used Asgardian magic to alter Loki's appearance to look like an Asgardian.