Triangle Silicone Breast Form (Concave Back) – Single 300g – Standard Back

Single Triangle Breast Form – 300g

Sometimes you only need one breast prosthesis rather than a full pair — after a mastectomy, to balance a natural difference, to help after a lumpectomy or partial surgery, or to replace a lost or damaged form. This single silicone breast form offers the same soft feel and natural shape as my pairs, designed to sit comfortably inside a bra.

If you are replacing an existing prosthesis, please note that while the shape and size are consistent, cosmetic details such as nipple tone and colouring can vary slightly between production runs. If you are hoping to match an existing form, it may be worth getting in touch before ordering so I can help check the closest match available.

Full Weight Silicone Breast Prosthesis

This breast form is made from full-weight silicone, creating a realistic silicone breast prosthesis that feels much closer to natural breast tissue.

Many temporary breast prostheses provided through the NHS are around 30% lighter, often made with lightweight materials or hollow silicone. A full silicone breast form has a different feel. The weight is much closer to natural breast tissue, and many people prefer the natural movement, softness and gentle bounce that full silicone provides.

At approximately 300g, this size offers a comfortable everyday option while still giving the natural feel of full silicone when worn inside a bra.

Shape and Fit

Triangle breast forms are designed with a wide footprint and a gently concave back, helping them sit comfortably against the body and blend more easily with existing natural breast tissue.

Because of the concave back, this shape can be particularly helpful for those who still have a small amount of breast tissue remaining after surgery, such as after a lumpectomy or partial mastectomy. Instead of flattening natural tissue, the concave back allows the form to sit around it more naturally inside the bra.

The triangle shape provides a mid-level projection, creating a natural balanced silhouette. If you prefer a slightly perkier, more forward projection, my Teardrop Style 1 and Style 2 forms may be a better choice, as they sit higher and create a more lifted look.

Because of their extra width, triangle forms can also work well for those with wider frames or band sizes from around 36" upwards.

The form includes softly tinted realistic nipples raised to around 5mm, but when worn inside a standard bra — particularly one that is lightly padded — the nipple will not normally show through clothing.

Simply place the form inside a regular bra or a mastectomy/pocketed bra, where it will sit comfortably and help restore shape and balance.

Free 2nd Class UK Delivery

• Weight 300g each

• Approximately equivalent to 34C, 36B, 38A or 40AA breasts

• Dermatologically tested silicone

• Safe for swimwear

• Suitable for night wear when well supported

• Hand wash gently with soap and water, then pat dry

Dimensions

Top to bottom measurement: 13.3cm

Side to side at widest point: 15cm

Depth of breast form: 5.3cm (nipple not included)

Diameter of dark area of nipple: 4cm

Diameter of raised nipple: 1.5cm

Height of nipple: 5mm

Packaging

Each breast form is hand packaged in soft strong tissue paper, placed inside a padded jiffy bag, and then sealed inside a strong waterproof mailing bag for extra protection during delivery.

A luxurious black presentation box is also available (see images above). If selected, the box will be carefully packed with padding and sent in a plain shipping box.

For bespoke postage needs or if you have any questions, please feel free to get in touch.