Most common questions and issues are addressed below. If you have a question on another topic, contact us.

Purchasing Milli

A: If you have a complaint about your Milli device, please complete the form on our Contact Us page.

A: Claims on the 1-Year Manufacturer’s Warranty require proof of purchase within the warranty period. Email support@hellomilli.com should you wish to submit a warranty claim.


Please keep your original purchase receipt as evidence that the date of your claim falls within the warranty period. Milli products come with a 1-year manufacturing warranty. Milli warrants this product for a period of ONE (1) YEAR, after the date of original purchase, against defects due to faulty workmanship or materials. If you discover a defect and notify Milli during the warranty period, Milli will, at its discretion, replace the product free of charge.

The warranty covers working parts that affect the function of Milli. It does not cover cosmetic deterioration caused by fair wear and tear or damage caused by accident, misuse or neglect. Any attempt to open or take apart Milli will void the warranty. Claims under warranty must be supported by reasonable evidence that the date of the claim is within the warranty period. To validate your warranty, please keep your original purchase receipt for the duration of the warranty period.

If you experience any problems with Milli, have any questions regarding its operation or believe you are eligible for a warranty claim, please contact support@hellomilli.com.

A: Due to the use and nature of our product, we do not accept returns. We can replace your Milli should it not perform properly. See warranty details.

A: We offer free shipping on all orders. Orders will be shipped within 2-3 days except weekends and holidays.

A: We do not offer international shipping as Milli is a medical device and only has market authorization in the US.

A: Milli will be sent to you in a white box with zero markings and a mailing label. Milli comes with a charging case for discreet charging.

Product Features

A: Gradual sizing refers to the incremental size adjustments that occur from the wand area of Milli, which increases and decreases in diameter size. This feature allows the user to insert Milli once and gradually achieve the desired size instead of removing and inserting different sizes. The Milli sizing, by use of plus (+) and minus (-) buttons, is millimeter-by-millimeter.

A: To increase the size of Milli, you will need to either press the + button on the handle consecutively, or you can press and hold the + button until you see the corresponding number for your goal on the display screen.

A: Milli expands in a square shape due to the internal mechanics of the product. Some women might assume the vagina is a cylindrical tube, but the shape of the vagina in its relaxed state generally resembles an H as the walls flatten against themselves.

A: Milli will flash with “Ch” when low on charge and may shut down completely if not immediately charged. Place Milli in its case and ensure the charging cord is plugged into the wall. An orange light from the case and a flashing “Ch” on the Milli display will indicate Milli is charging. A full charge occurs once the case has a faint green light and Milli no longer displays “Ch”.

A: The battery life of Milli can vary depending on use case (time, vibration setting, etc.) but should last several sessions.

A: Milli provides gradual expansion from 15mm to 40mm, which is similar to the typical range of sizes in static (fixed size) vaginal dilator sets. Milli may mimic the size of tampons, speculums, and possibly your partner. Per the British Journal of Urology, the average penis diameter is 37mm, and Milli’s 40mm size replicates the majority of men.

Using Milli

A: The Milli Vaginal Dilator is a tool intended for controlled dilation of the vagina. It can be used for dilation for an examination (by your doctor), in preparation for a surgical procedure or to help relieve the symptoms of vaginismus (condition that involves tightening of the vaginal muscles) and related painful sex.

A: If using lubricants, a water-based lubricant should be chosen. Milli uses a silicone polymer cover, which means you cannot use silicone-based lubricants with Milli as they may cause damage.

A: Soap and water should be used to clean the wand portion of Milli and the handle should be wiped with a damp cloth. We recommend washing and drying Milli after each use. Milli is not waterproof, so please do not submerge Milli under water.

A: Milli is within TSA guidelines for a carry-on object. When traveling outside the USA, you may need to use an adaptor to charge Milli. Milli is designed to be used with outlets up to 240 volts.

A: We recommend using Milli in a way that is most comfortable for you. Rotation is not necessary when using Milli.

A: You may experience some discomfort during your therapy. Discontinue use and contact your healthcare provider if you feel pain. Adjusting to a lower setting may relieve some discomfort. There may be two reasons for pain associated with Milli use: tightness and angling. If you are increasing Milli’s size too fast, you may experience discomfort and Milli might hurt. Try expanding slower and over multiple sessions. As Milli expands in a square shape, the ridges may put pressure on your urethra. If you are feeling intense pressure, you can try to rotate Milli and see if that relieves discomfort.

A: Users have shared they have included their partner while using Milli. Milli can be used as preparation before intercourse with or without your partner as you see fit.

A: Consider using Milli as part of foreplay or minutes before intercourse. Milli is to be used at your own pace when and where you feel most comfortable. See if collaboration with your partner enhances your experience.

A: Once you are comfortable inserting Milli at its rest (start) size, we recommend trying to slowly increase the size. This should help you prepare for future insertion of other items besides Milli.

A: Yes. You can use Milli at any time. We recommend washing Milli per the cleaning instructions.

A: Milli can be a helpful part of foreplay. If Milli feels good for masturbation, we encourage you to take advantage of that pleasure.


A: Milli needs to charge. Place Milli in its case and plug the case into an outlet.

A: Milli may need to charge. Place Milli in its case and plug the case into an outlet. If Milli still doesn’t turn on after charging, please contact support@hellomilli.com for further assistance.

A: Milli probably needs to charge. Place Milli in its case and plug the case into an outlet. Milli will automatically retract once charging begins.

A: It is normal for Milli to get warm during use or after being used for an extended time. Should you find Milli overheating, causing any discomfort or impacting the way it operates, please contact support@hellomilli.com for further assistance.

A: Milli may be responding to previous commands. Wait for the device to stop moving, then re-enter your (+) or (-) command by pushing the desired button.

A: Make sure Milli is nested correctly in the case and the charging prongs are touching the contacts in the case. You shouldn’t need to use force to properly cradle Milli.

Additional Resources

Download instructions for use
Contact Us