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How to Draw Breasts – Form & Motion

October 12, 20155 Comments

Assignment: If you haven’t finished the assignment from last week’s lesson, keep working on that.

Recap: Last time we went over the common mistakes of drawing breasts. Air-Balloon Boobs, Squished Boobs, misconceptions about nipple size, and of course Anti-gravity Boobs. If you’re a teenage boy, you’re probably wondering, “Stan, what’s wrong with this?!” This is fine for some genres of art, but if you’re drawing realistic women, this won’t happen.

Ok, let’s learn how to draw breasts correctly.


Let’s remember our bones and muscles for a second. The forms you see near the armpit and clavicles are from the pectoralis major muscle.

This muscle appears and acts the same way on a female as it does on a male. Be sure to study the lesson on pecs.

Female Anatomy Chest Outline

Of course, on females, there’s an additional mass that sits on the lower part of the pecs. The transition from muscle to fatty tissue is soft and gradual. Notice that the breast mass flows with the pectoralis major into the armpit.

How Breasts Hang off of Chest

Remember that the ribcage is rounded, so the breasts are naturally aimed outwards at roughly a 45 degree angle. This means that the nipples are not dead-center. Instead, they sit closer to the outside edge of the breasts.
Top View of Breasts at an Angle

From the side view, we can see the upward facing plane of the chest. After the upwards-facing plane (orange) is a downwards-facing plane (blue). For small and perky breasts, there’s a gradual angle back into the ribcage. For larger breasts, the weight pushes them down and then they swoop back up to the infra-mammary fold.

Side View of the Breasts


The breasts will react to movements of the body. So, they will look different in different poses. When lying on the back, the breasts roll off the sides of the ribcage. This means they’re flatter and more distant from each other.

Drawing Pair of Breasts Laying Down and Bending Over

When bending over, the breasts will hang off the chest.

The breasts follow the motion of the shoulders. When the arms go up, the breasts go up, and the inframammary fold softens. When one arm goes up, the breast on that side will go up. The same applies for adduction and abduction of the arm. This causes the breasts to compress and stretch.

Compress and Stretching of the Breasts

When hanging upside-down, the breasts will roll up the chest, in the same way they roll to the sides when the figure is lying on her back.

Breasts Upside Down and Squished Together

When lying flat on the stomach, the breasts are squeezed between the chest and the ground plane.


That’s it, thanks for watching! If you’re posting your drawings, use hashtag #proko and don’t forget to follow me on Facebook and Instagram. If you like this video, share it with your friends, and if you want to be updated about new videos subscribe to the Proko newsletter.

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Comments (5)

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  1. Lester says:

    Good job, not good but amazing

  2. TripleKings says:

    And if the figure you’re drawing is a bit overweight? Or if the figure has breasts bigger than what you drew?

  3. Interesting… Once again, equally applicable to my figurative sculpture work. Yeah, breasts there follow all the same rules (including gravity).

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