The first size is a 6 1/4 x 54 Toro Grande (which will have an SRP of $7.09 per cigar). The second size is the 5 1/2 x 50 Robusto en Crystal (which will have an SRP of $6.99 per cigar). As the name indicates, the Robusto en Crystal will be packaged in a sealed glass tube.
The Partagas 1845 line was released early in 2012. The blend was a collaboration between Jhonys Diaz, Francisco Rodriguez, and Yuri Guillen of General Cigars. The legendary Benji Menendez also served as an advisor for the project. According to the press release, Diaz and his team worked through 50 different blends before coming up with the final blend.
The 1845 (which is a name on other Partagas Cigars), this is significant because it marks the year Don Jaime Partagas y Ravelo established the Partagas factory in Havana Cuba.
The Partagas 1845 Robusto (5 1/2 x 49) scored a 91 on Cigar Coop last year.
At a glance, here is more information on the Partagas 1845 line:
Wrapper: Ecuadorian Habano Seed Viso
Binder: Connecticut Habano
Filler: Dominican Piloto Cubano, Nicaraguan (from three regions)
Toro Grande: 6 1/4 x 54
Robusto en Crystal 5 1/2 x 50 (Crystal Tube)
Corona Extra: 4 1/2 x 46
Robusto: 5 1/2 x 49
Double Corona: 7 1/4 x 54
Gigante: 6 x 60