---
title: "Reviews — pen needles 31g 5mm - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/pen-needles-31g-5mm/reviews"
last_updated: "2026-08-11T23:03:05.966Z"
locale: en
meta:
  description: "Niche score 55/100 · $186K/yr market · 67K searches/yr · $17.64 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 55/100 · $186K/yr market · 67K searches/yr · $17.64 avg price. Strong incumbent ratings (4.7★) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — pen needles 31g 5mm - Flapen"
---

# **pen needles 31g 5mm**

**Worth a look**

Shows low returns (0.1%), but strong incumbent ratings (4.7★) keeps it on the watch list.

Market size 37Growth 33Conversion 97Competition 46Returns 99Price range 83Avg price 82Brand share 48Review moat 64Quality gap 21

**Returns**

**Incredible****0.1%**

return rate — above 5% kills the launch gate

**Conversion**

**Incredible****15.7%**

search→purchase rate — share of searches ending in a sale

**Price range**

**Great****$8.60–$50.25**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Avg price**

**Great****$17.64**

avg listing price — sweet spot $15–$100

**Review moat**

**Good****946**

avg incumbent reviews — the moat a new listing must climb

**Brand share**

**Okay****76%**

top-5 brand share — brands hold most of the demand

**Competition**

**Okay****57%**

top-5 click share — leaders hold, buyers still browse

**Market size**

**Okay****$186K**

$186K/yr · 67K searches

**Growth**

**Okay****+6.2%**

90-day search growth — must beat 0% to launch

**Quality gap**

**Bad****4.7★**

avg incumbent rating — lower means beatable quality

**Signals**[** Out of Stock**](https://flapen.com/research/niches?market=us&signal=out_of_stock "OOS rate > 10%")

## Reviews