My main ereader is a Kobo Clara and would have been the Libra 2 (bought twice and returned twice due to constant freezing issues did not want to chance a third time!). My Clara has a sleep cover and fits easily in my purse or my everyday bag which for some years now has been a crossbody/messenger bag from Flip and Tumble.
https://flip-tumble.myshopify.com/pr...nt=23710726595