---
title: "Trend — 18th birthday decorations - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/18th-birthday-decorations/trend"
last_updated: "2026-07-31T14:01:01.439Z"
locale: en
meta:
  description: "Niche score 63/100 · £512K/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 63/100 · £512K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Trend — 18th birthday decorations - Flapen"
---

# **18th birthday decorations**

**Worth a look**

Shows low returns (0.6%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 60Growth 21Conversion 76Competition 87Returns 97Price range 0Avg price 20Brand share 96Review moat 71Quality gap 63

**Returns**

**Incredible****0.6%**

return rate — above 5% kills the launch gate

**Brand share**

**Incredible****35%**

top-5 brand share — no brand owns this niche

**Competition**

**Great****28%**

top-5 click share — an open shelf

**Conversion**

**Great****7.2%**

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

**Review moat**

**Good****654.63**

avg incumbent reviews — the moat a new listing must climb

**Quality gap**

**Good****4.4★**

avg incumbent rating — lower means beatable quality

**Market size**

**Good****£512K**

£512K/yr · 967K searches

**Growth**

**Bad****-8.3%**

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

**Avg price**

**Bad****£7.36**

avg listing price — sweet spot $15–$100

**Price range**

**Bad****£2.68–£14.07**

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%")