Emma's sweater in the Pearly White Harbor scene looks quite a bit like this one by Nanette Lepore:
Cream V-Neck Jitterbop Baby Cropped Pullover ($60)
More short-sleeved v-neck tops in pretty blush tones:
Ann Taylor Double V-Neck Sweater ($58)
J.Crew Featherweight Cashmere Rolled-Sleeve Cardigan ($100)
Ann Taylor LOFT Dolman Sleeve V-Neck Pullover ($39.50)
Tweed skirts in every price range:
Merona Collection Petites Sydney Tweed Skirt from Target ($18.88)
Kate Spade Julie Tweed Miniskirt at Bloomingdales ($275)
The Limited Clean Pocket Miniskirt ($24.99)
The Indispensible Tweed Pencil Skirt from Spiegel ($29)
And of course, everyone is swooning over Emma's oversized bow brooch and sweater chain. It looks like a vintage brooch with a chain attached, most likely one of Lou Eyrich's genius inventions.
I browsed Etsy and found this gorgeous piece, which would look smashing attached to a plunging v-neck top with a delicate white blouse underneath.
Oversized Gold Bow Brooch from CandyShopVintage ($50)
More of my favorite finds on Etsy:
1951 Hollycraft Jonquil Yellow Rhinestones HUGE BOW Brooch/Pin from HollycraftCollector ($65)
Golden Sparkling Bow Brooch from VintageAlcove ($12.50)
Jackson Rhinestone Bow Brooch from OnTheTown ($18)
If anyone feels the creative urge to make one of these unique sweater chains, please do send me a photo! I'd love to see what you come up with!