Proportion
The aim is a result that looks in proportion to the shaft. A volume that suits one man can look excessive on another.
10ml vs 15ml vs 20ml Penile Filler
How the three volumes offered at Hardrock Clinic differ, why the same volume produces different results in different men, and when less is the better choice.
- Medical reviewer
- Assoc. Prof. Dr. Zulfu Sertkaya, urologist and andrologist, FEBU
- Published
- Last medically reviewed
- Physician review pending
- Last updated
In brief
The short answer
Short answer
The clinic offers 10, 15 and 20 ml of hyaluronic acid filler. Broadly, more volume gives a more noticeable change in girth, but the result also depends on shaft length, existing girth and tissue laxity, so volume alone does not predict the outcome. The final volume is confirmed by the physician at the in-person assessment and can be revised down; treatment can also be staged, starting lower and adding more later.
Treatment
The three volumes side by side
| Factor | 10 ml | 15 ml | 20 ml |
|---|---|---|---|
| Typical treatment goal | A modest increase in girth | A moderate increase in girth | A larger increase in girth |
| Degree of change | Subtle | Moderate | More noticeable |
| Who may consider it | Men wanting a conservative first treatment, or whose anatomy suits a smaller volume | Men wanting a clearer change than 10 ml; the clinic’s most preferred package | Men wanting a more noticeable change whose anatomy and tissue can accommodate it |
| Clinic-reported change (clinic’s own caseload, not guaranteed) | Approx. +4 cm circumference | Approx. +6 cm circumference | Approx. +8 cm circumference |
| Price (package) | Basic: €2,000 | Advanced: €2,400 — includes follow-up control | Premium: €2,800 — includes follow-up and a touch-up according to clinic policy and physician assessment |
| Approx. treatment time | ~30 minutes | ~40 minutes | ~45 minutes |
| Staged treatment possibility | Can be a first stage; additional filler is priced separately | Can be a first stage; additional filler is priced separately | Touch-up included according to clinic policy and physician assessment |
| Anatomy | Shaft length, existing girth, tissue laxity and foreskin anatomy are assessed for every volume | As for 10 ml | As for 10 ml; the physician checks whether the tissue can take this volume comfortably |
| Consultation requirement | In-person assessment; volume confirmed by the physician | In-person assessment; volume confirmed by the physician | In-person assessment; volume confirmed by the physician and can be revised down |
For comparison, a 2025 single-centre audit of 324 men reported a mean flaccid girth gain of 2.5 cm (range 1.5–4 cm) at a mean volume of 15 ml. That is a conference abstract, and its measurement method is not the same as the clinic’s. The results guide explains how to read published and clinic-reported figures side by side.
Treatment
Why the same volume gives different results
Filler adds a layer of gel around the shaft. How much the circumference changes depends on how thick that layer ends up, and thickness depends on how large an area the gel has to cover.
- A longer shaft has more surface to cover, so the same 15 ml is spread more thinly and the measured gain is smaller.
- A wider starting girth also means more surface area around the shaft, with the same effect.
- Tissue laxity affects how much gel the skin and dartos layer can hold comfortably and evenly.
This is why two men receiving the same package can measure differently afterwards, and why no clinic can honestly promise a fixed number of centimetres for a given volume. It is also why the clinic’s planning takes account of shaft length, existing girth, tissue laxity and foreskin anatomy before a volume is agreed.
Treatment
Why more is not always better
Tissue tolerance
The gel sits in a thin, mobile layer. The physician judges how much that layer can hold evenly without undue tension.
Risk of irregularity
Published series report asymmetry, lumps and migration of gel. The more gel there is to distribute, the more careful the planning needs to be.
In the 324-patient audit, reported complications included foreskin migration (7.7%), asymmetry (6.1%), lumps (4.6%) and infection (1.5%); all were managed, and no serious adverse events were reported. That study did not report rates separately by volume, so it cannot tell you whether a given volume is riskier. Full detail is on the risks and safety page.
Treatment
Is 20 ml too much?
Not for everyone, and not automatically suitable for everyone either. The published audit above reported volumes ranging from 10 to 30 ml, so 20 ml is within the range used in practice. Whether it is right for you depends on your anatomy.
The physician may recommend less than you asked for if your shaft is shorter, your tissue is tighter, or the change you describe can be reached with a smaller volume. The final volume is confirmed at the in-person assessment and can be revised down. The clinic may also advise against treatment altogether when expectations cannot be met, or when the concern appears body-dysmorphic in character — European urology guidelines recommend psychological evaluation for men of normal size who seek augmentation.
Treatment
Starting lower and adding more later
Some men prefer a staged approach: a smaller first treatment, time for swelling to settle and the contour to develop, then a decision about whether to add more. Hyaluronic acid suits this because it is temporary and can usually be dissolved with hyaluronidase if needed.
- First treatment. Baseline circumference is measured at assessment, then the agreed volume is placed, moulded and checked for symmetry.
- Settling period. The first-day appearance is larger than the settled result. The final contour develops over the following weeks, as the recovery guide describes.
- Review. Symmetry and the result are assessed. The Advanced package includes follow-up control, and the Premium package includes follow-up and a touch-up according to clinic policy and physician assessment.
- Additional filler, if appropriate. Filler beyond the package is not included; a top-up is priced case by case according to clinic policy and physician assessment.
The prices and inclusions for each package are set out in penile filler cost in Turkey.
Questions
Common questions
Which volume do most men choose?
The clinic describes the 15 ml Advanced package as its most preferred. That is a description of demand, not a recommendation for you; the physician confirms the volume at assessment.
Can I book 20 ml and be told to have less?
Yes. The final volume is confirmed in person and can be revised down if the physician judges a smaller volume more appropriate.
Will 10 ml give me 4 cm?
Not necessarily. Approximately +4 cm is the clinic’s own reported figure for 10 ml, not a guarantee. Published studies report lower mean gains, and individual results vary.
Does more volume last longer?
The sources cited here do not establish that. Longevity varies between individuals and is covered in the guide to how long penile filler lasts.
More answers are collected on the penile filler FAQ page.
Next step
Ask about your own anatomy
General information cannot tell you whether this treatment suits you. The patient coordination team can answer practical questions, and suitability and volume are decided by the physician at an in-person assessment.
Sources
References
Published sources cited on this page. Conference abstracts are identified as such; they have not been through full peer review as journal articles.
- Raheem A, Konstantinidis C, Abdel-Raheem T. Penile girth enhancement with hyaluronic acid injection: a single-center study. J Sex Med. 2025;22(Suppl 2):qdaf077.122 (conference abstract). doi:10.1093/jsxmed/qdaf077.122
- Falcone M, Bettocchi C, Carvalho J, et al.. European Association of Urology guidelines on penile size abnormalities and dysmorphophobia: summary of the 2023 guidelines. Eur Urol Focus. 2024;10(3):432-441. doi:10.1016/j.euf.2023.08.012 · PubMed 37709592
- King M, Convery C, Davies E. This month’s guideline: the use of hyaluronidase in aesthetic practice (v2.4). J Clin Aesthet Dermatol. 2018;11(6):E61-E68. PubMed 29942426