How many pounds and pant sizes lost with losses in inches?

Hello, I am a female and I lost 1.50 inches of my waist. 1 inch off of my Abdominals, and 1.25 inches off my hips. I am wondering how much weight I might have lost in pounds. I was 143 pounds, and I am 5 foot 4 inches. I don't have a scale in which to weigh myself, as I feel if I have not lost enough pounds I may deter from my weight loss efforts. Also, how many pant sizes if any, do you think I lost (I was a size 9/10 according to Canadian pant sizes)? Any help would be greatly appreciated. Thank you in advance.