If she is close to her friends or sisters, they likely know her exact preferences.

Buying a ring for your girlfriend is less about adhering to a strict "3-month salary" rule and more about showcasing your commitment through thoughtful planning and knowing her personal style. Whether it is an engagement ring or a promise ring, the most impactful choices often come from listening to her hints and selecting something that reflects her taste, rather than just the price tag.

“Mature Ariel said, 'It isn't the ring that matters, it is the love that goes into buying one that is.' ... I would have gotten married to this man if it had been a 25¢ gum ball machine ring.” Facebook · Bored Panda · 1 year ago

A durable, everyday ring (like a 2mm+ band) is often better than a "show piece" that might be too fragile, as discussed by Reddit users .

If you are unsure of her exact taste but want a surprise proposal, buy an inexpensive, simple ring and tell her you will go together to pick the final one.

A common, though not foolproof, method is that a woman’s ring size is often close to her shoe size. The "Solid" Story Arc

Notice what jewelry she wears daily (gold vs. silver, minimalist vs. flashy) to avoid buying something she won't wear, as seen in these Reddit discussions .

“I bought my wife's ring 3 years before I proposed to her, because that's when I knew I wanted to marry her.” Facebook · Smosh · 1 year ago