One of the prebuilt character templates is exactly that.
For those that may not know, a character's physical build does have significance in Dragon's Dogma, unlike say Dark Souls.
From the wiki:
It determines the appearance of a character but also affects its stats. The weight of a character has a significant effect on their speed, stamina and other mechanics.
Lighter characters will prove to be quick and energetic while larger characters can hold more items without losing performance and will find it easier to lift and throw items, enemies and other characters. Medium weight characters will strike a healthy balance between all these categories.
Character weight is affected by a number of factors, the main ones being Character Height, and character build and musculature.
- Heavier classes are able to activate pressure plates faster.
- Heavier classes have a proportionately larger hitbox; smaller classes have a correspondingly smaller hitbox.
- Heavier classes are able to grapple and immobilize targets better.
e.g., Harpies can't fly off with a heavier class clinging to its legs and the heavier classes are able to hold the Harpy on the ground, immobilized, more easily.
- Different body parts also can change the character's height and weight.
- Walking speed is affected by leg length, not weight. Run speed is affected by encumbrance.
- If the character is too light, they may have to grab onto a pawn or carry more items in their inventory.
-The maximum amount of stamina given can vary based on the chosen weight class and are directly affected based on weight rankings. Characters gain 20 stamina for each weight class above M and lose 20 stamina for each weight class below M. This is commonly referred to as "True Stamina". More details regarding this can be found on the Stats page.
- The Leg-Strength skill is more effective for LL and L class characters as it increases their base movement speed by one weight class. This does not affect stamina use.
- The Sinew skill is a proportionately larger percentage increase to lighter characters because of their lower default carrying capacity.
- In Dark Arisen, Sinew will stack with the Trophy Boots, or any L3 Bitterblack Armor
- Greaves or Boots with either of the two appropriate weight-capacity bonuses.