Just for comparison:
Edmonton in 2016:
https://globalnews.ca/news/2931038/e...-rogers-place/
Winnipeg in 2017:
https://www.cbc.ca/news/canada/manit...licy-1.4097889
Toronto in 2017:
https://www.cbc.ca/news/canada/toron...ures-1.4297834
A lot of stadiums in the US have also implemented a bag policy -- i.e. maximum allowed is a 14x14x6 clear bag. Looks like some arenas in Canada have followed suit (although it doesn't have to be clear).