I use Skinny Clips.
They're $14.95 for a pack of 4 and they come in 4 basic colors (black, nude, navy, and white).
I usually only need one. You can clip them anywhere on the waistband of your pants and twist. They're hardly noticeable, and way more effective than a belt IMO. I've used them on several different types of pants (jeans, sweats, leggings...)
Who doesn’t, right 😂
There’s options other than belts, stuff like this:
Skinny Clip Waistband Tightener for Men & Women - Hold up Pants, Skirts & Shorts Tighter without a Belt https://www.amazon.com/dp/B07N5CFXFP/ref=cm_sw_r_cp_api_glt_fabc_TAFZMTGDVVG7WQH1H7JA
Adjustable Nail-Free Waist Buckle,Waist Buckle Extender Set Jeans Extender Waist Extender Button for Pants Jeans,The Best Tool to Tighten Pants and Skirts(3 Set) https://www.amazon.com/dp/B08HN36BKB/ref=cm_sw_r_cp_api_glt_fabc_T0SH4VNJ5ZZHQ9N763V3
People who are saying thrifting are right. Also there’s clothing modifications you can make as you get to the in between sizes.
Like the skinny clip
Leather tool punches for belts are key
I also really liked these no sew buckle clasps - they say “extender” but it’s more like “no sew” tailoring. My only critique is that the backs of them can be uncomfortable over the day or if you’re sitting down. But, because you can adjust them, they’re a great option to save you a couple pant sizes. Especially if you lose weight faster in your stomach than your legs (like me)
Shirts are less expensive than pants - so if you can cycle shirts through and keep your pants - that’s a major money saver.
Tailoring can also be a good option - especially when you get closer to your goal weight. You can keep clothes and have them tailored for less than buying something similar again.
Learning to “dart” your own clothing can be good too. You can either do it by hand or with a sewing machine.
Hand-me-downs are fantastic (clothing swaps in the before times were great for this). When I did the bulk of my weight loss I lived off of hand-me-downs for the first 40 lbs. You have to compromise on your “style” verse saving money, but it was worth it in the long run financially - plus it was really rewarding to finally buy clothes I loved in my size!
And, outlet stores. Places you can get inexpensive professional pieces for work (if you need that) are really important. I did, and still tend to buy clothes that are giving and allow me to have normal weight fluctuations.
Congratulations on your journey!