So you want to really recreate the vintage 50s style? A vintage bra from the 1950s had a drastic, conical shape to it that is aptly described as a "bullet bra". Replicate the sexy retro "sweater girl" look with a vintage or reproduction (new) bra that will give the desired shape. They also make great additions to a 50s Halloween costume such as Marilyn Monroe.
Victoria?s Secret Bra

Victoria?s Secret Bra

Price: $3.19
Time Left: 12h 19m
Vintage Longline Bra, Bustier. 36B. 80s

Vintage Longline Bra,  Bustier. 36B. 80s

Price: $5.99
Time Left: 13h 45m
Vintage Strapless Nylon Bra 1940s Ivory

Vintage Strapless Nylon Bra 1940s Ivory

Price: $19.95
Time Left: 14h 23m