AS
@tinymoose suggested, those two brands are reliable. Most ski-oriented jackets are cut with a trimmer shape as opposed to snowboard jackets which tend to be more loose. However, I have found that reading the description from the manufacturer when they list "fit" they state trim, regular, loose, and very loose.
I am small too, and have found trim cuts in many brands, including snowboard jackets.
For ski style you will find most will be trim: NILS KJUS SPYDER DESCENTE and even NORTH FACE ( not a ski-specific oriented company) , plus several other companies have nice fitting jackets.
On the Snowboard side DC VOLCOM CAPPEL/RIDE . I would stay away from BURTON AND ROXY as they are always too big. PICTURE ORGANIC is another company offering slim styles. As does PATAGONIA.
COLUMBIA can be be a toss.
Kind of like buying jeans...your favorite brand/model will not fit the same way even when you take three of the very same pair to try on. I did not list the many brands included in my own ski wardrobe, but I have something from every one i DID mention above. And don't forget the two
@tinymoose mentioned: Marmot and Obermeyer ! I have those as well.
Yes, I have waaayy too many ski jackets and pants.