They have different size on the website, but it really depends on how large your bicycle battery is. The largest one is 60W and ways 1.7kg. A small bicycle like that might have 300Wh or so. Since you probably just lay them on the ground and they are not 100% efficent anyway with charging you need 10 solar panels or so to charge your bicycle up within an hour.
If you want it for a cycle trip, then you are probably better of having a fixed panel on a trailer. That way you can charge during the trip and non flexible panels are much more efficent. You end up with something like these.
RedCarCastle@aussie.zone 1 day ago
Whats your goal here? Are you planning to ride around the country on like an electric mountain bike or something? Im not sure you’ll get a compact solar panel that can change a battery in an hour, my panles on my house can only put out 250watts, 50v at 5 amps in full sun, at a brief glance and some dodgy math it would still take 2-3 hours to change an e-bike battery