Brought this today only 50p for 90m approx and approx 350m wide, its not the Asda smart price.
It was also 50p for 30m or 60m, I did point this out to the man next to me who was grateful.
Sorry I dont have Asda online, so think it may be instore only
I have looked on tesco and the price for their one is about £2.84 for 100m.
I hope this is handy as I'm sure we all use this!
please note i have used the picture for the 30m one, as that is all I can see without having to log in, as I am not registered with them