Opera length, leather with mousquetaire. Leather opera gloves are part of the iconography of showbiz and are absolutely of the flavour of the season right now. You might not wear them to pop out to the pub but there could be a moment in everybody’s life when there is a need for long leather gloves. If you’ve got a Big Occasion in the offing, this is the glove. Be prepared.DimensionsOpera Length. Séverine is a 16 inch glove. This is measured from where the thumb seam meets the wrist, to the opening of the glove.