From the museum's Web site; enlarged by half.
This dress has a triangular collar like English dresses. The sleeves are made of different material than the bodice and skirt - false sleeves. The false sleeves are set off by two sets of rolls with scalloped edges on both sides and may be made of the same material as the visible surface of the collar. She wears a camica with a button.
Keywords: Allori, Isabella de’ Medici, Isabella Ramola de’ Medici, Medici family, Orsini family, Italian, curly coiffure, bandeau, veil, fitted bodice, vee neckline, collar, lining, brooch, rolled paned over-sleeves, long tight close false sleeves, girdle, jeweled pendant chain, vee waistline, chemise, jeweled buttons, puffed cloth sleeve ornaments, cuffs, close skirt