It definitely fits under a stroller too but the straps are really comfy also. 😌
I stopped using diaper bags when my oldest was around 4 months old. I couldn’t stand carrying multiple bags with me everywhere I went, since then I’ve always just made sure I bought bigger purses to accommodate whatever my kids needed at the time.
I use a backpack (: my newest one is from Vera Bradley I have space for our portable changing mat which holds our extra diapers, & I stuff a pack of wipes in ontop so I can easily access em, and there’s still a ton of space for all my belongings too (and some toy cars) https://www.amazon.com/dp/B08TP6YZGD?psc=1&ref_=cm_sw_r_apin_ct_ZKSSN0FN0224NZJ8QF6R_1&language=en_US