If your prescription or last pharmacy box says "30G x 8mm," you're likely using NovoFine 30G 8mm pen needles. Eight millimeters was once a standard pen needle length, and plenty of people still use it today, often because it's what they started on years ago. This guide explains what the 30G and 8mm numbers mean, which pens these needles fit, who they suit, how they compare with shorter needles, and what a box costs per needle.
What Are NovoFine 30G 8mm Pen Needles?
NovoFine is Novo Nordisk's long-running line of single-use pen needles. The 30G x 8mm version screws onto the tip of an injection pen and is used once, then thrown away in a sharps container.
- 30G (gauge): how thin the needle is. Higher numbers are thinner, so 30G is slightly thicker than the 31G and 32G needles common today, though still a fine needle.
- 8mm (length): how far the needle goes into the skin. It's longer than the 4mm, 5mm, and 6mm options most new users are started on.
- 100 count: each box holds 100 individually sealed needles, one per injection.
Which Pens Do NovoFine 30G 8mm Needles Fit?
NovoFine needles use the standard screw-on connection found on most US insulin and GLP-1 pens. That generally includes Novo Nordisk FlexPen and FlexTouch pens and the Ozempic pen, plus Lilly KwikPens and Sanofi SoloStar pens. The needle brand doesn't have to match the pen brand. Your pen's Instructions for Use is the final word on compatibility, and your pharmacist can confirm fit.
Pens with a built-in needle, such as single-dose autoinjectors, don't use separate pen needles at all.
Who Uses 8mm Pen Needles Today?
Widely used injection technique guidance now favors shorter needles (4mm to 6mm) for most adults, because they reach the fat layer under the skin with less chance of going into muscle. Even so, 8mm needles still have a place:
- Long-time users who have injected with 8mm for years and whose provider is happy with their results.
- People whose provider specifically recommends a longer needle for their situation.
- People who use a pinched-up skin fold or an angled injection, as many providers advise with 8mm needles to help avoid injecting into muscle.
If you're starting injections for the first time, a shorter needle is the more common starting point. Don't switch lengths on your own; a change in needle length can also mean a change in technique, so talk with your healthcare provider or diabetes educator first. For a full side-by-side, see our guide to 4mm vs 6mm vs 8mm pen needles.
8mm vs Shorter NovoFine Options
- NovoFine 30G 8mm: the longest option here, usually used with a skin pinch.
- NovoFine 32G 6mm: a middle step for people moving to a shorter needle.
- NovoFine Plus 32G 4mm: the shortest and thinnest, typically injected straight in at 90 degrees without pinching for most adults.
A longer needle isn't needed for a bigger dose. Length is about reaching the right tissue, while holding the needle in the skin for the time your pen's instructions state helps you get the full dose.
Cost Per Needle: What a Box Works Out To
The NovoFine 30G 8mm 100-count box is currently $54.99 at Zahrun, about $0.55 per needle (prices can change, so check the product page). Roughly how long a box lasts:
- 1 injection a day: about 3 months
- 4 injections a day: about 3.5 weeks
- Once-weekly GLP-1 pen: well over a year, so check the expiration date on the box
If your provider moves you to a shorter needle, the NovoFine Plus 32G 4mm 100-count box is a popular choice. Pen needles are generally an eligible FSA/HSA expense; check with your plan administrator.
Quick Checklist Before You Reorder
- Confirm "30G x 8mm" matches what your provider recommended.
- Count injections per day across all your pens, multiply by 30, and add a small buffer.
- Remove both the outer cap and the thin inner cap before injecting.
- Use the skin-pinch or angle technique your provider taught you.
- Use a new needle every time and dispose of it in a sharps container.
FAQ
Are 8mm pen needles outdated?
They're less commonly started today, but they're still made and used. Whether 8mm is right for you is a decision for you and your provider.
Will 30G hurt more than 32G?
The difference is small, and many people can't tell. Comfort also depends on technique, site rotation, and using a fresh needle each time.
Can I reuse a NovoFine needle?
No. Pen needles are single-use. Reusing one can dull the tip, clog the needle, and raise infection risk.
Compare every brand and length in our pen needles collection. New customers can use code WELCOME10 for 10% off their order.
This article is general information, not medical advice. Follow your healthcare provider's instructions for your medication, needle size, and injection technique.
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