Brands
- Margaret Smith
- Marge Hats
- Marhill
- Maria Guy
- Marian Thompson
- Marie Alphonsine
- Marja
- Marlowe White
- Marquise New York Paris
- Marshall Field & Co.
- Martha Gene
- Martha Original
- Mary Barron
- Mary K
- Mary Lorene
- Maud Roser
- Maud Roser licensed copy
- Maudie's Millinery
- Max Mayer
- Max Sachs
- Maxine Hats
- Maya de Mexico
- Mazet
- McCall's