About MONO MOON

MONO MOON is a private tattoo studio founded in 2020. The studio is co-owned by two talented artists, Sai Li and Mariel Bayona, and focuses on creating a safe and welcoming space for all clients. They specialize in fine line tattoos and aim to make the tattoo experience comfortable and enjoyable. Clients praise the clean, cozy, and calming atmosphere of the studio, as well as the artists' talent, professionalism, and dedication to their craft. Mariel is known for her beautiful, detailed tattoos done quickly with a light hand, and her work is highly regarded for its quality and staying power. Sai is appreciated for her exceptional precision, professionalism, and ability to make clients feel welcome, even after long drives. The booking process is described as easy and convenient.

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Reviews for MONO MOON

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  • May 2026

    From the moment I walked into Monomoon, I immediately felt the welcoming atmosphere and positive energy that Sany created. She was incredibly patient and understanding throughout the stenciling process, which I especially appreciated since this was my first large tattoo and I was feeling a bit nervous.
    Sany guided me through every step, making sure I was comfortable, hydrated, and well taken care of the entire time. Her artistry and professionalism were truly impressive, and her work inspired me greatly.
    Overall, my experience with her was exceptional from start to finish. I would absolutely return to Sany in the future and highly recommend her to anyone looking...read full review

  • Apr 2026

    I had my first tattoo done by artist Sany. She made the process really easy with great communication and giving me all the information pre and post session. Mono Moon is a beautiful clean studio. I felt very comfortable the whole process. I was able to park in a parking garage down the street. Want completed my tattoo in one session and offered me breaks and snacks if I needed. I absolutely love how my tattoo turned out, her work is so beautiful and she made my concept come to life. Healing went very well and took about 3-4 weeks.

  • Sep 2025

    This is my second time coming to this shop and all the artist are super kind and attentive. I got my tattoo done by Mariel and she is amazing. This is my second tattoo done by her and I will keep coming back to her. The shop is very clean. The only downside is parking, but I feel that’s common in the city just make sure to prepare ahead in case you can’t find parking near the shop.

Hours

Monday: 10AM - 7PM
Tuesday: 10AM - 7PM
Wednesday: 10AM - 7PM
Thursday: 10AM - 7PM
Friday: 10AM - 7PM
Saturday: 10AM - 7PM
Sunday: 10AM - 7PM

Tips

 on-site services by appointment only wheelchair accessible street parking free wi-fi women-owned gender-neutral restrooms

Location

1200 Union St, San Francisco

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