Wide Mouth vs Regular Mouth Mason Jars
The opening size is the main practical difference between mason jars, and it changes what each jar is best for.
Wide mouth jars
Wide-mouth jars have an opening as broad as the jar body, so they are easy to fill, pack with chunky foods and clean by hand. They suit pickles, whole vegetables, meats and dry storage where you scoop in and out. Wide-mouth lids and jars also cost a little more.
Regular mouth jars
Regular-mouth jars narrow at the top, which costs less and gives a slightly more secure seal for long storage. The narrower opening is fine for pourable foods like jam, jelly, sauces and juice, but more awkward for packing chunky items or cleaning.
Which should you choose?
Choose wide-mouth for chunky foods, easy filling and cleaning, and dry storage. Choose regular-mouth for jams, sauces and juices, and to save money. Note that the two mouth sizes need their own lids and bands, so standardising on one size keeps your kit simple.
Frequently asked questions
Are wide mouth or regular mouth jars better for canning?
Wide-mouth jars are easier to fill and clean, ideal for chunky foods and pickles. Regular-mouth jars cost less and suit pourable foods like jam and sauces. Both are safe for canning.
Are wide mouth and regular mouth lids interchangeable?
No. The two mouth sizes take different-sized flat lids and bands, so you cannot swap them. Standardising on one mouth size keeps buying lids simpler.