Start with what you can see at home
The advantage of buying for a partner is access. If her clubs live in the garage or the hall, three things will tell you almost everything: what brand of ball is in the bag, whether there's a rangefinder pouch clipped to it, and whether the glove in the front pocket is worn through.
Matching the ball brand she already plays is the highest-confidence gift available in golf. It requires no judgment from you at all — just read the box.
What to buy at each budget
Under $25. Hat-clip ball markers, a magnetic towel that actually stays on the cart, a good divot tool. None of these are exciting to unwrap on their own, which is why they work best packaged together or added to a larger gift. Our under $25 page has more.
Around $50.A leather scorecard holder is the pick here. It is the closest thing golf has to a personal accessory that doesn't need a size, it survives rain, and it looks better after a season than it did new. A ball stencil is the other one — it turns every dozen she ever buys into personalized ones.
Over $150. Distance measurement. A laser rangefindergives the exact number to the flag; a GPS watch gives the distance to the green without needing to point at anything and passes as an everyday watch off the course. Either is a gift she'd use every hole of every round.
The two things not to buy without a size
Gloves.Women's golf gloves have their own size range and a different cut, and the hand matters — a right-handed golfer wears it on the left. Get either wrong and it's unusable rather than merely imperfect.
Shoes. Five hours of walking on uneven ground means fit is not negotiable, and golf shoes need a width as well as a length. If you want to buy shoes, check the pair in her closet rather than estimating.
If she plays socially rather than seriously
Not everyone who golfs is trying to get better at it. For someone who plays for the company and the afternoon out, the gifts that land are the ones that make the round more pleasant rather than more accurate — sunglasses that cut the glare, a cooler sleeve that fits the bag, a towel that isn't always in the mud. Skip the training aids entirely.