Go to the Body section and select the Tattoos sub-category. Select the Item: Look for the coffeemoon thumbnail.

The by coffeemoon is a custom content (CC) item for The Sims 4 available on The Sims Resource (TSR) . This cosmetic mod uses specifically positioned shadow accents to give your Sim a thinner face by highlighting cheekbones and eye sockets. Key Specifications

Found in the Tattoo category within Create A Sim (CAS). Customization: Features 9 colors and 3 distinct styles.

Check and Script Mods Allowed . Restart the game to apply changes. How to Apply the Contour in CAS

Works for both male and female Sims (Teens through Elders) and is HQ mod compatible .

Select from the 9 available color swatches to match your Sim's skin tone for a natural or dramatic "skinny" look. Where to install Sims 4 custom eyes and tattoos? - Facebook

Go to the official download page on The Sims Resource and download the .package file.