The side of the ribcage is long and gently curved, running from under the arm to the waist. It suits tall designs that follow the body's side: a line of script, a branch of flowers, a bird in flight, or a full side piece that wraps toward the back. Designs placed along the curve of the ribs look more natural than ones dropped in the middle of the side.
Rib skin is mostly covered, so tattoos there see little sun. Weight changes, muscle gain or pregnancy can stretch the area, and very thin script can blur where the skin is softest. Lines with a little weight and designs with some open space hold up best.
Visibility is low. A shirt covers rib tattoos completely, and only swimwear or a cropped top shows them. That makes the ribs a common choice for meaningful pieces people want to keep private, and it means you rarely need to think about a dress code before you book.
The ribs are a hard sit. The skin is thin over bone, and breathing moves the canvas, so many people prefer short sessions. Healing means keeping bra bands, waistbands and tight shirts off the fresh tattoo, and sleeping on the other side.