Is this the Pleiade edition that you got:
I regret to say I am in the market for a much cheaper edition.
This shows the first volume of what I bought: À la recherche Vol 1, though all three volumes that I have came with boxes rather than dust jackets.
The size, 4.13 x 1 1/8 x 6 7/8 inches, differs from the Amazon quote, and 14.4 ounces seems correct though I don't have a scale to measure it. The size and weight fit comfortably in the hand and the off-white color of the pages is easy on the eyes, two important characteristics for a book you're going to spend a long time with. Not to mention Vol 2 and Vol 3.
When I get around to it, I intend to read Sodome et Gomorrhe in the paperback Folio Edition with a préface by Antoine Compagnon. Amazon does not show a picture of the volume that I bought used, which bears a picture of Monet's "Cathédrale de Rouen, effet de soleil." The dimensions and weight are roughly the same as the hard cover edition.
Litteratureaudio.com carries noncommercial
recordings of all seven volumes, though the volume you have may differ from the version the readers use. The website lets you listen to samples of the readers and equally important points to online texts, if that is you prefer that to hard copies (or of course you could print out the texts if printer ink is reasonable to buy).