Human Hair Extension Market Insights   The global human hair extension market size was valued at USD 1.39 billion in 2024. The market is projected to grow from USD 1.49 billion in 2025 to USD 2.26 billion by 2034, exhibiting a CAGR of 7.3% during the forecast period. Human hair extensions are premium‑quality hairpieces used to enhance length, volume, or style without chemical treatments....