I keep in the 5s and rarely see even a 6. I do this by eating almost NO carbs.I can't remember how long it took me to get here, but I've been in the 5s for years.
It's not NECESSARY to eat ANY carbs at all, so they are easily avoided once you get used to it. Unfortunately, carbs are addictive and the initial giving up can be HARD.
I'm not fanatical. Today one of my gym gang brought in a chocolate cake for coffee time and I had a tiny bit, just to join in. about 8 carns all together, I estimate. I had a wholemilk latte too, which isn't much carb either. My meal was left-over Quiche..ish from yesterday. near zero carb.
In addition, as of this morning, I'm lighter than I was in my 30s [65 now!] and my BMI has dropped to 28.[weighed by gym instructor!] Still not slim, but better. That's near 3 stone off. All by eating nutrient rich foods and avoiding empty calories.
Keeping to nutrient rich natural foods is my key.
Hana