The Pan-Latin Lexicon of Collars and Sleeves in Fashion and Costume, developed within the Pan-Latin Terminology Network (REALITER), aims at collecting the main terms designating collars and sleeves in fashion and costume. It proposes a semiotic reference for a common referent, in order to try to establish terminological equivalences in this very technical and specialised field, characterised by several cultural traditions. The Lexicon intends to give a multilingual (Italian, Catalan, Spanish, French, Portuguese, English) terminological description in this field, in order to provide a useful reference for those interested in this sector, those who study, translate, write and work on fashion and costume. In the case of the Spanish language, the equivalents in the Spanish of Spain, Argentina and Mexico are provided. For the Portuguese language, the Brazilian Portuguese equivalents are also given.