Classic fit jackets are wider at the waist and longer in the tail. Pants are fuller in the leg, with a standard height waist.
Slim fit jackets are tapered in the shoulders, chest and waist for a more defined silhouette. The Pants are slimmer in the leg with a lower rise.
Extra slim fit jackets are nipped in further at the waist for a modern, ultra-trim look. The Pants are slim through the leg with a low rise.