Single jersey vs interlock vs pique

Single jersey

The most common weft knit, made on a single set of needles. It has a smooth "V"-stitch face and a looped back, is lightweight and drapey, and stretches mainly across the width. Its one quirk is that the raw edges curl. It's the default for everyday T-shirts and the most economical knit.

Interlock

A double-knit: effectively two single jerseys interlocked, so both faces are smooth and identical. It's thicker, more stable and softer, doesn't curl, and holds its shape well — but uses more yarn, so it costs more. Common for premium T-shirts, kidswear and dresses.

Pique

A knit with a raised, textured surface (a fine waffle/honeycomb). It's breathable and more structured than plain jersey — the classic polo-shirt fabric.

Rib and fleece (the common companions)

Rib has pronounced vertical columns and strong crosswise stretch and recovery — used for collars, cuffs and fitted tops. Fleece is a knit with a brushed or looped inner face for warmth — the basis of sweatshirts and hoodies.

At a glance

Construction	Faces	Feel	Edge curl	Typical use
Single jersey	Different (V-face / looped back)	Light, drapey	Yes	Everyday tees
Interlock	Same both sides	Thicker, stable, soft	No	Premium tees, kidswear, dresses
Pique	Textured	Structured, breathable	Minimal	Polo shirts
Rib	Ribbed columns	Stretchy, recovers	No	Collars, cuffs, fitted tops
Fleece	Brushed/looped back	Warm, heavy	No	Hoodies, sweatshirts