I never thought of myself as properly well off until I realised how much we actually have. Our income isn't extremely high, but we do have a very good standard of living. We own our home with a low mortgage in a desirable area, have done work on the home without going into debt, own a car, have a membership at a local club, our daughter doesn't want for anything, and we don't go into debt around Christmas. We buy her items year round as she needs them, and don't make her wait for Christmas or her birthday (unless it's a month before either). We go on holidays, visit my family in the States yearly (sometimes twice a year if Covid wasn't here), and have the money to send our daughter to a very good (expensive AF) nursery without struggle.
We also don't buy huge gifts for Christmas. This year our 4 year old is getting a "new" iPad. Air. It's my iPad, but she's essentially taken it as hers so we've found the old packaging, wiping it clean, bought a new case for it, and giving it to her as a "new" tablet. She's also getting quite a bit of new little things, like a little camera to take photos (about £25), some books, more paints, and some clothes for her Barbies. That's essentially it. We also donate toys in her name at Christmas, so we take half of her budget and donate those toys/food/money to a local charity.
She also gets a lot of experiences, so Disney on Ice in London. So, she gets a weekend in London, with DoI and ice skating. We live in York, so that's a weekend trip. We're going to the States in February, and taking her to Frozen musical, Grand Canyon, hiking, professional basketball and hockey games, etc.. Taking a trip into Mexico with my family. All of these experiences are bought as her Christmas gifts. And some of these experiences are gifts from my family.
So, while our income isn't exceedingly high (£95k combined), with our low cost of living, we feel quite well off.