The general formula for a blues scale is as follows (all numbers are the Degrees of the Scale from the corresponding Major scale):
1, b3, 4, b5, 5, b7, 8 (1)
So, using that formula, you get all of these scales:
Bb Blues Scale:
Bb, Db, Eb, Fb, F, Ab, Bb
B Blues Scale:
B, D, E, F, F#, A, B
C Blues Scale:
C, Eb, F, Gb, G, Bb, C
Db Blues Scale:
Db, Fb, Gb, Abb, Ab, Cb, Db
D Blues Scale:
D, F, G, Ab, A, C, D
Eb Blues Scale:
Eb, Gb, Ab, Bbb, Bb, Db, Eb
E Blues Scale:
E, G, A, Bb, B, D, E
F Blues Scale:
F, Ab, Bb, Cb, C, Eb, F
Gb Blues Scale:
Gb, Bbb, Cb, Dbb, Db, Fb, Gb
G Blues Scale:
G, Bb, C, Db, D, F, G
Ab Blues Scale:
Ab, Cb, Db, Ebb, Eb, Gb, Ab
A Blues Scale:
A, C, D, Eb, E, G, A