Check out this thread - tons of pics!
http://forum.purseblog.com/balenciaga/join-the-day-club-73257.html
And here is a list taken from BalNY of dimensions and prices:
*Handbag (Dimensions in L"x W"xH") and Prices:*
First (13x2x6) $995
City (15x3.5x10) $1195
Giant City $1595
Twiggy (14x6.5x7) $1095
Day (16x5x13) $995
Giant Day $1245
Messenger (16x5x13) $1040 (same shape as the Day bag but with a long adjustable shoulder strap)
Flap Messenger (12x5.5x13) square shape with long adjustable shoulder strap
Work (18x5x13) $1385
Giant Work $1725
Weekender (21x9x15) $1495
Men's Weekender (21x9x15) (longer handles to fit over shoulder)
Bowling (12x3x15) $1185, Handles fit over shoulder, with zipper closure
Mini Bowling (12x2.5x11) $1075 Handles fit over shoulder, with zipper closure
Part Time (16x6x9) $1295(with shoulder strap)
Giant Part-Time $1645
Afternoon$1245 (14topx17bottomx6x13) (handles fit over shoulder)
Mid-Afternoon$1195 (11topx14bottomx5x11) (handles fit over shoulder)
Courier (13x8.5x12) $1175 (adjustable strap that fits across the body)
Extra Courier (24x9x17) $1295 (adjustable strap that fits across the body)
Brief (12top/17bottomx3x13) $1195
Giant Brief $1595
HTH!!