The pockets hold so much and help organize things well. This part is my fault, I didn't realize my laptop was a 16-inch instead of a 15-inch (why did apple change it). My 16-inch Macbook Pro still fits in this bag (no laptop sleeve) with a tight squeeze. With my laptop, this bag still zips up and fits: over-ear headphones, all my cables for charging laptop and phone, wallet, journal, reading book, small battery pack, hand sanitizer, pens, highlight, car keys, airpods, aligner case, hard drives w/ case, digicam w/case, and a 17oz water bottle (or my liter bottle but that's a tight fit and doesn't zip fully). And TBH, if I didn't have my work headphones, I could probably fit more books or a sweater or an umbrella.
I wish there were maybe 1/2 inch more room for height, width, and depth to make it a little less cramped, but it functions well for what I need at work and looks SO cute. I'm also 5'0 and petite, and it doesn't look giant on me.