The Brightroom Storage Container from Target is a nice alternative to custom acrylic cases for storing Pokemon ETB's, with dimensions of 8 inches in height and 8 inches in length, and 4 inches in width.
Note: These housed my sealed collection of ETBs for the last few years, so some may have slight scuffs or scratches, but overall are in like-new condition.
*ETB not included. This listing is for (1) container
Thank you for looking!