Grandpacore POD Gap: Fashion Forecasters Confirm 2026's Rising Heritage-Menswear Aesthetic While eRank and Printify's Etsy Trend Guides Stay Silent

Findings

• Fashion forecasting firm Heuritech identifies Eclectic Grandpa/Grandpacore as a fast-rising aesthetic that has evolved from a niche thrifting subculture into a recognized pillar of contemporary menswear.
• The #grandpacore TikTok hashtag drew over 16.5 million views during the trend's 2024 breakout, and a 2026-dated style guide (sewmamasew.com) states the look has "officially hit the mainstream this year."
• AW26 knitwear forecasting (Maxted Clothing) corroborates cable-knit and camp-collar heritage silhouettes as a fall 2026 staple, though without using grandpacore terminology, showing the underlying aesthetic circulating even where the name has not caught on.
• eRank's dedicated 2026 Etsy trend guide names Nanna Chic/Modern Nostalgia -- the feminine-coded counterpart aesthetic -- but contains no mention of grandpacore, cardigans, or heritage menswear anywhere in its trend list.
• Printify's Leading Trends for Etsy Sellers in 2026 guide names 11 distinct style and micro-trends (Chateaucore, Old-money romance, MIDImalism, Literary girl, Island luxe, Galactic metallic, Maritime living, Castlecore, Cutecore, Cherry everything, Reptile niche) and omits grandpacore entirely.