A–B cups
Aerie, Calvin Klein, Lively, and ThirdLove dominate the small-bust market with bralettes, push-ups, and seamless contour bras.
C–DD cups
ThirdLove, Wacoal, Natori, and Soma offer the widest size range with consistent fit. Victoria's Secret runs about half a size large.
D+ cups (full bust)
Panache, Freya, Curvy Kate, Bravissimo, and Wacoal are the gold standard. They make sizes up to K cup with serious engineering.
Indian sizing
Enamor and Jockey India lead for everyday cotton bras. For premium, Triumph and Wacoal are widely available.