Key takeaways
- Up to 5 feet 5 inches: Choose a short or youth bag, usually 60 to 66 inches long.
- 5 feet 6 inches to 6 feet: A regular adult bag, usually 72 to 78 inches long, is the most common choice.
- 6 feet 1 inch to 6 feet 6 inches: Choose a long bag, generally 78 to 84 inches long.
- Over 6 feet 6 inches: Look for an extra-long or tall-specific bag, and check the manufacturer’s shoulder, hip, and foot measurements.
What's inside
If you are wondering, “what sleeping bag length do I need,” start with your height, then add enough room to move your feet without creating a large pocket of cold air. Most adults fit a regular sleeping bag, but children, tall campers, and broad-shouldered sleepers may need a different length or shape. A good fit improves warmth, comfort, and packability.
The Short Answer
Choose a sleeping bag that is about 6 to 12 inches (15 to 30 cm) longer than your body height. This gives you room to stretch while keeping the hood and footbox in the right places.
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- Up to 5 feet 5 inches: Choose a short or youth bag, usually 60 to 66 inches long.
- 5 feet 6 inches to 6 feet: A regular adult bag, usually 72 to 78 inches long, is the most common choice.
- 6 feet 1 inch to 6 feet 6 inches: Choose a long bag, generally 78 to 84 inches long.
- Over 6 feet 6 inches: Look for an extra-long or tall-specific bag, and check the manufacturer’s shoulder, hip, and foot measurements.
For example, a 5-foot-10-inch sleeper should usually look for an interior length of roughly 78 inches. A 6-foot-4-inch sleeper may be more comfortable in an 84-inch bag. Do not rely only on labels such as “adult,” “XL,” or “tall.” Brands measure bags differently, and some list the exterior shell length rather than the usable interior length.
A little extra room is helpful, but excessive length can reduce warmth. Empty space inside the bag must be heated by your body. For cold-weather camping, prioritize a close fit around your shoulders and feet, while leaving enough space to bend your knees and wear a thin base layer.
Standard Sizes
Sleeping bags do not have one universal size chart, but these ranges represent common dimensions for rectangular, semi-rectangular, and mummy-style bags. Width is measured at the shoulder or widest point; mummy bags taper considerably toward the feet.
| Size | Typical user height | Bag length | Approximate length in cm | Typical shoulder width | Best for |
|---|---|---|---|---|---|
| Youth/short | Up to 5 ft 5 in | 60–66 in | 152–168 cm | 26–30 in | Children, smaller adults, and shorter sleepers |
| Regular adult | 5 ft 6 in–6 ft | 72–78 in | 183–198 cm | 30–34 in | Most average-height adults |
| Long/tall | 6 ft 1 in–6 ft 6 in | 78–84 in | 198–213 cm | 32–36 in | Tall adults and sleepers who want more foot room |
| Extra-wide | Varies by height | 78–84 in | 198–213 cm | 36–40 in | Broad shoulders, side sleepers, and layered clothing |
Typical packed lengths range from 10 to 18 inches (25 to 46 cm), although compression sacks can reduce the storage size. Lightweight synthetic bags often weigh about 2 to 4 pounds (0.9 to 1.8 kg), while larger four-season bags may weigh 4 to 7 pounds (1.8 to 3.2 kg). Weight and packed size usually increase as a bag gets longer, wider, or warmer-rated.
Rectangular bags provide the most room for feet and changing positions. Mummy bags are narrower and generally more efficient in cold conditions. If you are between sizes, choose the larger option when comfort matters more than minimum pack weight. For backpacking, choose the smallest bag that lets you fully extend your legs and avoid compressing the insulation.
How to Measure Your Space
- Measure your height without shoes. Stand straight against a wall and mark the top of your head. Measure from the floor to the mark. Do not use your shoe size or clothing size as a substitute.
- Add 6 to 12 inches. Add 6 inches (15 cm) for a close-fitting mummy bag and up to 12 inches (30 cm) for a roomy rectangular bag or cold-weather layers.
- Measure your shoulder and hip width. Lie on your back with your arms relaxed. Measure across the widest part of your shoulders and hips, then add at least 4 to 8 inches (10 to 20 cm) for movement.
- Check foot room. Your toes should not press firmly against the end of the bag. Leave roughly 2 to 4 inches (5 to 10 cm) of space so insulation can loft around your feet.
- Compare the actual product measurements. Look for maximum user height, shoulder girth, hip girth, and foot girth. These details are more useful than a simple “regular” or “large” label.
- Account for clothing. If you sleep in a fleece layer, insulated pants, or thick socks, add extra width. Avoid sizing up so much that the bag has large unused cavities.
Remember that a sleeping bag liner changes comfort and cleanliness more than it changes the bag’s physical size. A full-length liner, such as a lightweight travel liner with a zipper and pillow pocket, can add a thin layer without requiring a longer bag. Budget liners and basic camping bags often fall in the $15–$30 range, while larger or colder-weather sleeping bags commonly range from about $25 to $100 or more.
By Room or Use Case
Backpacking and hiking
For backpacking, length should be close to your body size because every extra inch can add weight and bulk. A regular bag around 72 to 78 inches suits many adults, while tall hikers should consider 78 to 84 inches. A mummy shape is usually easier to pack than a wide rectangular design. Check the packed dimensions and total weight; a bag that fits but occupies half your backpack may not be practical.
Car camping
Car campers can prioritize comfort over minimum weight. A rectangular bag with a 78-inch length and 32- to 40-inch shoulder width gives more room to turn and stretch. Couples may prefer a double bag, but verify the combined interior dimensions rather than assuming two standard bags will zip together. A roomy bag is especially useful when changing clothes inside a tent.
Cold-weather camping
Cold-weather bags should fit closely around the torso, hood, and feet. Choose a length that gives you room for a base layer but not a large empty chamber. If you are between regular and long sizes, the longer bag may be worthwhile if your feet touch the end of the shorter option. Look for a draft collar, adjustable hood, insulated zipper, and a temperature rating appropriate for your conditions.
Kids and growing campers
Children need a bag that is short enough to retain warmth. An oversized adult bag can leave too much unheated space around a small body. Youth bags commonly measure 60 to 66 inches long, though some are designed to extend as the child grows. If using an adult bag for an older child, secure excess space near the footbox with the manufacturer’s adjustment system rather than bunching the bag randomly.
Travel and guest use
For occasional indoor guests, festivals, or warm-weather travel, a simple rectangular bag or liner is often enough. Focus on a washable shell, a compact stuff sack, and a width that suits the sleeper. Basic adult bags in this category often cost around $20–$45, while XL designs for broad or tall sleepers may run roughly $30–$80.
Common Sizing Mistakes
- Choosing by height alone: Two people of the same height can need different widths because of shoulder, hip, or clothing measurements.
- Confusing bag length with user height: A 72-inch bag is not intended for someone who is 72 inches tall. You need additional space for movement and insulation.
- Buying extra-large for warmth: Too much empty space can make a bag feel colder and heavier.
- Ignoring the footbox: Long legs may fit while large feet remain cramped. Check foot width and shape.
- Using the packed size as the sleeping size: The stuff-sack dimensions describe storage, not the interior sleeping area.
- Forgetting layers: A bag that fits over a T-shirt may be too narrow over a fleece jacket or insulated clothing.
- Assuming all “XL” bags are tall: Some XL models are wider but no longer. Read both the maximum user height and width measurements.
FAQ
Should my sleeping bag be longer than I am?
Yes. Most sleepers need about 6 to 12 inches (15 to 30 cm) of extra length. This allows you to stretch out and leaves room for the insulation to surround your feet.
What sleeping bag length do I need if I am 6 feet tall?
A regular bag measuring 72 to 78 inches is usually suitable. If you have long legs, sleep in layers, or prefer more room, choose a 78-inch long model after checking its interior measurements.
Is a longer sleeping bag warmer?
Not necessarily. A longer bag can be less efficient if it leaves a large unheated space around your feet. The warmest choice is generally the shortest length that lets you move comfortably without compressing the insulation.
Can two sleeping bags be zipped together?
Sometimes. The bags usually need compatible zipper types, matching lengths, and opposite zipper locations. Even when they connect, the combined bag may have uneven insulation or a drafty opening, so check the manufacturer’s compatibility information before buying.
