The blue ones I have vary quite a lot. You can see pics by following the link below.
'Baby Bunting' is VERY small but fast growing.
'Blue Cadet' is a bit larger, but still fast growing. I'm making mine into a border in a dark garden where a lot of hostas have failed to thrive.
'Blue Mouse Ears' is a good one, but still small. Thought to be a sport of 'Blue Cadet'. Thicker, rounder leaves.
'Blue Ice' is a slower growing small blue.
'Blue Wedgwood' is larger but mine doesn't grow particularly fast. Nice powdery blue which holds well during the season.
'Bulletproof' is a tough blue hosta - maybe a tetraploid.
'Full Moon' I've found to be really slow growing and I'm planning to give mine to a friend.
'Halcyon' or any of the Tardiana blues are nice plants. My 'Halcyon' is not particularly fast growing, but it holds its colour well.
'Salute' is a nice upright blue.
I don't have it, but 'Pewterware' is a nice blue too.
Those are the solid blues I have. But it's worth considering some that are blue with margins or have a lot of blue in them like 'Frosted Dimples', 'Deja Blu', 'Fragrant Bouguet', 'Touch of Class', or even 'June'.
