Had some begonia tubers delivered today classed as pendula giant is someone having a laugh?
I expect it's the flowers that are meant to be giant, not necessarily the tubers. That does look a bit puny, but it should grow and build up for future years. New tubers come in different sizes (for example
)- bigger ones will be more mature than smaller ones and therefore cost more. If you paid for tubers of a particular size and what you received are all smaller, it's worth an enquiry (with your pictures) in case they made a mistake in picking the order.
Doncaster, South Yorkshire. Soil type: sandy, well-drained