As you can see in the following chart, if you are a Sun sign Sagittarius, you were born between Nov. 23 and Dec. 21st. But in order to find out your rising sign, you will need your full chart and time of birth. Your rising sign (or Ascendant) is actually more important when it comes to using astrology for fashion and to understand your appearance. The elements of the sign Sagittarius are the same, whether it is your Sun sign or rising sign. As you probably know, it is a FIRE sign. It's quality or modality is MUTABLE. The sign of Sagittarius is ruled by the planet JUPITER. The sign of Sagittarius rules the area of the body: the HIPS and THIGHS. There are many opinions about colors for this sign, but they include: purple, royal blue, blight blue, turquoise, khaki, olive and orange. You can wear those in any chroma. You can wear those colors whether this sign is your Sun sign or your rising sign. You may also want to look up the sign for both. (You can also check your Venus sign and the sign on your 6th house).
Sagittarius is quite charismatic due to the ruler being Jupiter. They are an independent free spirit and will reflect that in their clothes. But you will remember their personality more than their fashion sense. Sagittarius can bring an interest in equestrian styles as well as nautical. And Kimberly at Star Sign Style says Sagittarius is associated with the fabric pattern of diamond pattern. The fabric for Sagittarius would be lycra.
Must haves: practical, sporty street styles; leggings, well cut jeans; funky accessories, mini skirts, knee high boots
Back on rack: anything labeled dry clean only, floaty dresses, beads and sequins
Fashion for you:
Anything with a little risk and adventure, charms you. Fashion for you is sleek clingy and no frills silhouettes. You are more inclined to go cycling them shopping, unless is a new pair of riding boots. But your ruler Jupiter will be in the sign of Lion, in 2014 so you will be exuberant and fabulous this year. You like all colors, all trends and all styles, but try to use them separated, one at a time, please." source
ASTROLADA: she suggests also checking your Venus sign, because that shows what we prefer and then look at your Ascendant. Sun sign is only 20% and Moon is only 20% of your fashion influence.