Ravelry: Rowan 4 Ply Cotton

NICEEC 4 Skeins Soft Baby Yarn 100% Cotton Yarn for Crochet Knitting 4 Ply Yarn Blanket Yarn for DIY Craft Fingering Weight Yarn Total Length 4×175yds/4×50g-Light Pink

Signature 4 Ply - Multi-Colored

Regia 4ply Color Folkloric Yarn - The Websters

6 Solid Color Acrylic Yarn 6 Colors 4 ply Strands - Temu

WYS Signature 4-Ply sock yarn West Yorkshire Spinners – Isadora Popper

My first 4 ply yarn and I'm amazed at what it does for consistency. There's still some thick and thin spots or overspun areas but wow, totally changed the game. : r/Handspinning

Elle Premier 4 Ply Print 50g – Discontinued Colours – Lilia J Decor & Flowers

Schachenmayr Regia Premium Silk Color 4-ply Yarn - 9801634 - 00065 - Hobiumyarns

West Yorkshire Spinners Exquisite 4 Ply - Bordeaux (558)

Yarn Ply - Guide to Ply Charts & Conversions