Joie

Joie.  My size is always consistent with this brand. The fit works every time, and the quality is amazing.  I watch for promo codes and markdowns with Bloomingdale's, Nordstrom, Nordstrom Rack, Off 5th, and Last Call. This lightweight sweater I purchased at a steal at Rue La La. I also wanted to point out the jeans, these Tory Burch Classic Bootcut in Rinse are the best fitting mid-rise jeans  I've ever worn. I was quite lucky to purchase them at a deep discount on Rue La La. 

UPDATE:  I wrote to Rue La La and they kindly gave me the stock photos of the Joie sweater and TB jeans.

Joie 'Hina C' Striped Sweater, Porcelain/Caviar - ruelala.com (stock photo front) (stock photo back) (same print/color - different style at nordstromrack.com) 
Tory Burch Classic Bootcut Jeans, Rinse - ruelala.com (stock photo front) (stock photo back)
Halogen Long Layering Tank, white - nordstrom.com (sadly has been discontinued, the petite size is a perfect length for me)
Marc by Marc Jacobs 'Classic Q Natasha - Mini' Crossbody Flap Bag, black - Nordstrom
kate spade ny 'Tasha' flat, green/navy stripe - Bloomingdale's 
Marc by Marc Jacobs 'Link to Katie' stud earrings, Oro Gold - marcjacobs.com 
(this style has been updated with new colors here, and a drop style here)
kate spade ny 'idiom - all that glitters' boxed pavé pendant necklace, gold - kate spade