Grown from seed.
The sizes for Sarracenia are as follows:
S: ~10 – 20 cm height
M: ~20-40 cm height
L: >40 cm or flowering sized plants
XL: plants with multiple growth points
The numbers given here are just a rough scale, how we measure this for large errect plants. Smaller errect growing Sarracenia and flat growing species such as S. purpurea and S. psittacina are of course not categorized this way.
All plants stated as hardy were grown outside in the west of Germany. This is not necessarily applicable to other place and depends on the specific growing conditions.