How to tell which they need
Look at the bag they currently use. This takes five seconds and settles the whole question.
Two thin metal legs folded flat against the back means a stand bag. When the bag is set down, those legs flip out and hold it upright at an angle. That golfer walks and carries.
No legs, a flat wide base, and a channel or strap loop on the back means a cart bag. That golfer rides.
If they own both, buy for whichever they use more — and if you genuinely can't tell, this is a case for asking rather than guessing, because at $140 and up it's an expensive miss.
Why the wrong type is worse than nothing
This is the part that isn't obvious. A cart bag isn't simply a bigger stand bag — it has no useful carrying strap because it was never meant to be carried. Give one to a golfer who walks and they physically can't use it for its intended purpose.
The reverse is less severe but still real: a stand bag on a cart works, but the legs get in the way, the narrow base is less stable strapped on, and the golfer has given up the storage and club dividers they could have had for free, since weight doesn't matter when you're not carrying it.
The weight-versus-storage trade
Everything about a stand bag is a compromise in favor of weight, because a golfer walking eighteen holes covers around five miles with it on their back for four hours.
Ultralight bags get light by having less of everything — fewer pockets, less padding, fewer dividers. That's a genuine trade rather than a flaw. A golfer who carries a jacket, a cooler and three dozen balls will find an ultralight bag cramped; one who takes clubs and a water bottle will love it.
Cart bags have no such constraint, which is why they carry a full 14-way divided top and large insulated pockets. Nobody's shoulders are involved.
What the divider numbers mean
The top of a golf bag is split into compartments. A 4-way top gives four sections that clubs share; a 14-way gives every club its own slot, since a full set is fourteen clubs.
More dividers means less rattling and tangling and much easier club selection. It also adds weight, which is the whole reason carry bags settle for four or five.
The third option nobody mentions
A Sunday bag— small, light, built for a partial set rather than a full fourteen — is the bag most golfers don't own and would use more than they expect. Range trips, par-3 courses, a quick nine after work.
Because it's an addition rather than a replacement, it sidesteps the biggest problem with bags as gifts: most golfers deliberately chose the bag they have, and replacing a functional one is harder to land than the price suggests. Our golf bag guide includes one.