models
adidas Stadium 4: Soccer Pocket vs Basketball Fit
The Stadium 4 offers a bottom ball pocket, ventilated dirty-gear storage and two bottle pockets specified for 32 oz bottles. Its manufacturer ball-fit claim is for a size-5 soccer ball. Basketball fit is not established by that claim, so check it directly if your main reason for buying is carrying a regulation basketball.
The bottom pocket is specified for a size-5 soccer ball
adidas describes a zipped bottom pocket that holds a size-5 soccer ball. That is the ball-fit claim for Stadium 4; it does not establish regulation basketball fit. If you need the same bag for both sports, check the basketball in that pocket before relying on it.
A ventilated pocket is described for dirty shoes or gear. No shoe-size limit is given, so the presence of these sports pockets does not establish fit for a particular pair of basketball shoes.
Bottle storage is better specified than computer storage
Two mesh side pockets are specified for bottles up to 32 oz. A water-resistant base is also listed. A padded laptop sleeve was not verified in the recovered specification.
For a practice load, the ball pocket, dirty-gear pocket and bottle storage are the useful features. For a school computer, compare the 5-Star Team's padded compartment evidence, while remembering that its device limit also remains unverified.
Use the retained dimensions for the correct model
Manufacturer search-index details list 13.25 by 10 by 19.5 inches. A retailer gives a slightly different first measurement; this guide retains the manufacturer value. Capacity in liters was not recovered.
Those measurements describe the exterior, not the ball-pocket opening. Varsity Elite is the more direct comparison when you need an explicit manufacturer statement that a full-size basketball fits.
The retained Stadium offer is not an exact Stadium 4 match
The retained Amazon catalog contains an adidas Stadium Soccer Backpack labeled 36 L, but it does not establish the JJ7618 Stadium 4 identity. It is shown only as a different Stadium-family alternative, with basketball fit still unverified.
Use the official JJ7618 page to identify the reviewed model, then require the seller to establish the same code before applying Stadium 4 dimensions or compartment claims. A shared Stadium name is not enough.
Sources and evidence
Our research method explains how we use these sources and handle missing specifications.