I've forgotten the manufacturer. They feel very soft and I used them as pajamas, but they might originally be underwear or innerwear. They are thin, so they are perfect as an inner layer for pajamas in the cold season. The letters on the tags have faded due to washing. They are faintly visible on the tags of the gray set. All sizes are the same, but there may be some stretching or shrinking due to washing. Please understand that there may be slight differences. The gray and white ones have small stains. For reference, the measurements of the orange one: Bottoms: Waist approx. 21 cm Total length approx. 59 cm Top: Width approx. 33 cm Length approx. 45 cm Pajamas, underwear, set-up, underwear, bulk sale, bulk purchase, kids, baby Bottoms, long underwear, heat tech, cold protection Stylish