Kirkland Signature 30 pack[1]:
380 sheets/roll
4.5"×4" sheets
$23.49 cost per pack
$0.016/square foot
Kirkland Signature Ultra Soft 36 pack[2]:
231 sheets/roll
$24.99/pack
$0.024/square foot
Charmin Ultra Soft 30 pack from Costco[3]
213 sheets/roll
4.5"×4.2" sheets
$27.49/pack
$0.033/square foot
[1] https://www.costco.com/kirkland-signature-bath-tissue%2c-2-p...
[2] https://www.costco.com/kirkland-signature-ultra-soft-bath-ti...
[3] https://www.costco.com/charmin-ultra-soft-bath-tissue%2c-2-p...