Size

Light

Damage is rolled with disfavor unless thrown. During a grapple, damage is rolled with favor. Two light weapons occupy one slot. Can be wielded in the off hand.

Short

One handed. Occupies one slot. Can be wielded in the off hand.

Medium

One handed. Occupies one slot.

Long

Attacks have a longer range. You get a free attack on enemies as they enter range. Two handed, bulky.

Great

Damage is rolled with favor. Two handed, bulky.