That was quite good. Now, the best way to learn about abilities is to actually go over the techniques, so lets start at the basics:
(Bubun Baika No Jutsu) - Partial Multi-size Technique
Rank: C
Type: Supplementary
Range: Short-Mid
Chakra Cost:15
Damage Points: N/A (+ 7 damage to taijutsu attacks)
Description: A practical application of the Multi-Size Technique which lets one expand their own body. The point of swelling a single part of the body is to use the weight to increase the power of one's physical attacks. Any bodily part may be augmented this way, but for ease of use the arms and legs tend to be chosen quite frequently. The speed of the expansion is exceedingly sudden, which makes it extremely difficult to avoid. Like the majority of the Akimichi clan's techniques, this one requires a considerable amount of chakra. This jutsu lasts for 2 turns.
NOTE:Must be a member of the Akimichi Clan
The absolute basics of the Akimichi Clan, upon which all of their other techniques are built. To practice, just focus on your right hand for the time being. So, as you alluded to, the Akimichi utilize their calories for all of their techniques, but it's more noticeable with the three colored pills, and the general Calorie Control technique, which in and of itself is unique with the chakra-constructed butterfly wings. But that's getting ahead of ourselves.
So, this technique utilizes both your chakra and a small portion of your calories. By sending your chakra throughout your entire body for a moment (this isn't a full-body surge), you can convert a small (unnoticeable) portion of the energy stored in your body fat to energy which you can use similarly to chakra. Pulling this energy from your body to your hand with your chakra, the two energies work together to allow you to manipulate your body (your natural energy you converted from fat) with all the preciseness and control/power as any other technique (your chakra). This specific technique allows you grow any part of your body (though only a part) to a certain size - too large, and even with your chakra you won't be able to move your body properly. If you want an exact number, I'd say anywhere between 2-3 times larger than normal should work. However, you can just go by the pictures because that's easier.
When you perform the technique, I want you to increase the size of your arm and then punch one of my infinite clones back and away from you with the increased weight, and therefore power, in your fist. After you've performed the technique, I want you to explain how you could use it in battle, as well as a few drawbacks the technique itself has.