Costco (Ontario) 2 Ply Scotties Premium facial tissue.

A little bit expensive at 0.85/ea, where equivalent tissue count from Shoppers or Rexall goes on sale for around 0.69/ea.

Scottie’s, Royale, Kleenex
Store Brands
No Name Brands
1 ply, 2 ply, 3 ply

All facial tissue... but in many ways different

I find the best source for beginning to comparison shop is using Flipp, and the search function to see what is on sale where this week and for how much

Costco is listing this deal as you’ve pointed out
Scottie’s 20 Boxes x 123 Sheets of 2 Ply = $ 16.99 (2460 Sheets)
Works out to 84.95 cents a box
Or 0.0690 per Sheet

Personally, we don’t find Costco to always have the best pricing, especially so on brand name paper products

Our usual go to often is Cdn Tire

This week, Cdn Tire is listing
Scottie’s 6 Boxes x 100 Sheets of 2 Ply = $ 3.99 (600 Sheets)
Works out to 66.50 cents a box
Or 0.00665 per Sheet

So slightly smaller Boxes, but also cheaper in the long run

This is only one example, as I say you can use the Flipp search function to find other Facial Tissue on Sale and do your own comparing