I used this product on my 12 oz salad dressing bottles and 16 oz barbecue sauce bottles (Both with 38 mm cap. I was using them to bottle hot sauce). These worked well for that application. This size was also suggested for the 5 oz. woozy hot sauce bottles (24 mm cap), but they were way too big for this. I wound up using a different type of heat seal from a different supplier because the smallest I was able to find on the site was 66 mm seals. I deducted a star not for the quality of the product, but because of the sizing recommendation on the site for the 5 oz woozy bottles. Also, worked well on 43 mm cap spice containers.
Thank you for your review, Michael! To ensure product compatibility, please reference the Works With section on the item page. A Customer Solutions Representative will contact you soon!