This is an inventory of all of Louisa's wardrobe. She often mixes and matches her separates, which makes her character feel very real.
Most of the time she has a new wardrobe for each series, but some items have shown up in several different series.
She has probably worn different pairs of blue jeans and dark (dark blue or black) slacks, but I have mostly lumped them together because they are impossible to accurately identify. The only exception was the faded blue jeans she wore in S2E9 and then all through S3. She also wears a lot of white camisoles that just peek out of the neckline of many of her dresses and sweaters. Since we usually only see a glimpse of them, I have listed them as either lace or plain neckline camisoles. There are a couple of camisoles that are very distinctive and they are listed individually.