The Fisual Dynami Duo Speaker Stands offer fantastic value and design for larger stand mounting and book shelf speakers. The whole stand is constructed from steel, has a height of 600mm and the top plate is 3 mm thick.
Absolutely all that is required.., and perhaps a bag of sand.
There are a few other styles from Fisual on the same site at around the same price.
This is good advice. A £5 bag of kiln dried sand from your local DIY is all that's required to fill stands (worth doing). Secondly, blu-tack is more than sufficient for attaching the speaker to the stand. The branded "HIFI" versions of these things cost loads more and do precisely the same job, so don't let anybody sell you any.