Guess is an American clothing brand that began in 1961 in Los Angeles, which has several diffusion lines, including Guess by Marciano, which is named after the four brothers who founded the brand. The Guess reversed triangle, and question mark logo is recognisable across the world, and it is most popular amongst younger women due to its entry-level price tag. The Guess by Marciano eyewear range is full of classic designs for women, with both optical lenses and sunglasses available. The brand has taken traditional frames, such as the cat-eye sunglasses, and have given them a new lease of life.