Hi. (I tried to search on this topic, so if someone could point me to a prior thread that'd be great.)

I want to get a rolling bag that will fit under the seat of the 3 aircraft that I travel on most often on NWA: DTW-OKC ER7 & CRJ, and DTW-LHR NWA A330-333. (am assuming if it fits the two little jets it'll fit the overseas jet)

I'm considering these two so far (price is a concern as well).
1. Travelon 14" Under Seat Rolling Carry-on Bag
Measures 14"L x 8"W x 16"H 14" Travelon

2. Travelon Wheeled Underseat Carry-On
Measures 13.5"L x 13.5"H x 8" Travelon Microfiber Under Seat Bag

Does anyone have any experience with these or other bags that definitely fit under those seats? Or possibly does anyone know the dimensions under those regional jet seats? Thanks so much everyone.