You cause a creature or an object you can see within range to grow larger or smaller for the duration. Choose either a creature or an object that is neither worn nor carried. If the target is unwilling, it can make a Constitution saving throw. On a success, the spell has no effect.

If the target is a creature, everything it is wearing and carrying changes size with it. Any item dropped by an affected creature returns to normal size at once.

Increase. The target's size doubles in all height, and its weight is multiplied by two. This growth does not increases its size category. If there isn't enough room for the target to double its size, the creature or object attains the maximum possible size in the space available. Until the spell ends, the target also has advantage on Dexterity saving throws. The target's weapons also grow to match its new size. While these weapons are enlarged, the target's attacks with them have their range increased by 5 feet.

Decrease. The target's size is halved in height, and its weight is reduced to one-half of normal. This reduction does not decreases its size category. Until the spell ends, the target also has disadvantage on Dexterity saving throws. The target's weapons also shrink to match its new size. While these weapons are reduced, the range is reduced by 5 feet minimum of 1 (if the minimum is 1 the opponent that was attacked has advantage against the target if they are still within 1 foot of the opponent)