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    Breast size slider/Small breasts (FLUX) - v4.0
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    I created it with intention of generation small breasts with Flux. It has some issues, but it can generate different sizes of breasts pretty well.

    How to use

    • On v1.0 and v2.0 positive strength means smaller breasts and negative bigger breasts (range is from -0.4 to 1.4)

    • On v3.0+ positive strength means bigger breasts and negative smaller breasts (v3.0 range is from -5 to 2.5 and v4.0 range is from -5 to 5)

    • No trigger words

    Known issues

    • Changes lightness/darkness of the image

    • Sometimes it generates blurry images

    Enjoy :)

    Description

    FAQ

    Comments (17)

    This_Rock
    Author
    Oct 7, 2024· 3 reactions
    CivitAI

    v4.0 changelog:
    - less lighting change
    - can generate larger breasts
    - deages subject when using negative strength

    With current training process I don't think I could train a better LoRA. I have couple ideas how to improve it further, but will need to find a new training process. If you want to reduce the overall imapct on the image you might try not applying the LoRA on first couple steps.

    micodeOct 13, 2024

    The best one on Civitai!

    w1ndStrik3Oct 19, 2024· 5 reactions
    CivitAI

    I really like this lora. Nice job. I did have a thought though: would it be very difficult to create an age slider for women using your existing dataset? I find the aging part of the lora to be working exceptionally well, and would love for it to be a parameter that could be set independently of chest size. I am a little tired of having to beat the crap out of flux for it to generate a woman which looks to be even a day over 30

    This_Rock
    Author
    Oct 19, 2024· 2 reactions

    Since this LoRA was trained as textslider sadly not that easily (since I don't have any dataset). I could though try to train a age slider, but since fluxes architecture uses t5 it is quite hard to extract the exact feature and then the LoRA changes more of the image than is wanted. I will probably wait for image slider training to come out or if I have time I might hack something together (but lately I didn't have much spare time so not very optimistic about that)

    ierimabogdanJan 15, 2026

    Hello, can you give me some tips, or a flow model of yours to work with, I'm a beginner

    WaifustuffFeb 20, 2025
    CivitAI

    How do you make such a concept would like to train a lora with a body feature too but i dont know with what kind of Pictures you did that. Did you trained the Lora with full body pictures or only breasts ?

    This_Rock
    Author
    Feb 21, 2025· 1 reaction

    V1 was trained with full body/half body images.
    V2 was trained with images focused on breasts only.
    V3 and V4 were trained as Leco text sliders, in V4 I just improved the prompt for training.

    malegirlApr 14, 2025· 1 reaction
    CivitAI

    Make Man Boobs Great Again

    ierimabogdanJan 15, 2026

    Hello, can you give me some tips, or a flow model of yours to work with, I'm a beginner

    mandridApr 24, 2025
    CivitAI

    Perfect, simple, works!

    LocalYokelJun 4, 2025
    CivitAI

    Finding that this makes my characters skinny if they have smaller breasts.

    Really messes with that pear shape body aesthetic.

    Stewie_Jul 8, 2025
    CivitAI

    Why can't I use this lora on Dezgo.com using flux model?

    HeiloAIJul 22, 2025
    CivitAI

    How is this trained? How can positive and negative weights be used to control breast size? I want to learn how to do this.

    CherrySockAug 4, 2025· 1 reaction
    CivitAI

    Works great. Thanks.

    ierimabogdanJan 15, 2026

    Hello, can you give me some tips, or a flow model of yours to work with, I'm a beginner

    brayn1701Aug 25, 2025
    CivitAI

    anyone tried this with kontext?

    Cukrova_VilaFeb 13, 2026
    CivitAI

    Hi, its ramarkable lora i love it. Im using it for years now it worked very well, but lately it doesnt listen at all, any idea what could be the problem? Can other Lora be block yours?

    LORA
    Flux.1 D

    Details

    Downloads
    15,784
    Platform
    CivitAI
    Platform Status
    Available
    Created
    10/7/2024
    Updated
    4/30/2026
    Deleted
    -

    Files

    breast-size2.safetensors

    Mirrors

    CivitAI (1 mirrors)
    Torrents (1 mirrors)
    Other Platforms (TensorArt, SeaArt, etc.) (1 mirrors)

    Available On (2 platforms)

    Same model published on other platforms. May have additional downloads or version variants.