Found a Havana H Upmann No 3 was 42x5.6, but dunno if thats the same cigar.
I did a search for H Upmann Seleccion No. 3 & came up with this:
H. Upmann Anniversary Series
Wrapper: Cameroon
Binder: Dominican Cuban Seed
Filler: Dominican and Brazilian
Seleccion No. 4 52 x 6 1/8"
Seleccion No. 3 50 x 6"
Seleccion No. 2 50 x 5"
Seleccion No. 1 44 x 6"