---
title: "Reviews — sister birthday card - Flapen"
canonical_url: "https://flapen.com/research/uk/stationery-office-supplies/sister-birthday-card/reviews"
last_updated: "2026-07-31T09:52:03.364Z"
locale: en
meta:
  description: "Niche score 60/100 · £431K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 60/100 · £431K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — sister birthday card - Flapen"
---

# **sister birthday card**

**Worth a look**

Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 57Growth 24Conversion 86Competition 86Returns 99Price range 0Avg price 9Brand share 91Review moat 87Quality gap 21

**Returns**

**Incredible****0.1%**

return rate — above 5% kills the launch gate

**Brand share**

**Great****44%**

top-5 brand share — no brand owns this niche

**Review moat**

**Great****255.43**

avg incumbent reviews — the moat a new listing must climb

**Conversion**

**Great****9.8%**

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

**Competition**

**Great****29%**

top-5 click share — an open shelf

**Market size**

**Good****£431K**

£431K/yr · 1.3M searches

**Growth**

**Bad****-1.0%**

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

**Quality gap**

**Bad****4.7★**

avg incumbent rating — lower means beatable quality

**Avg price**

**Bad****£3.36**

avg listing price — sweet spot $15–$100

**Price range**

**Bad****£1.65–£7.86**

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

**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=uk&signal=no_dominant_brand "Top brand's click share < 20%")