What size earrings are best for kids? For most children, small studs between 4mm and 5mm across. They sit flat on a small lobe, they're light enough to wear all day, and there's little to catch on a sweater or a hairbrush. Size has three parts: the width of the front, the length and thickness of the post, and the weight of the pair. Our materials page covers the material side of choosing.
The three measurements that matter
The front. Earring sizes in a listing almost always mean the width of the decorative front, measured across its widest point in millimeters. A 4mm ball stud is a ball 4mm across. A 5mm star is 5mm from point to point.
The post. The post is the wire that passes through her lobe. It has a length and a thickness. The thickness is given as a gauge, and standard earring posts are commonly around 20 gauge, about 0.8mm. A higher gauge number means a thinner wire, which surprises most people.
The weight. Weight is the measurement nobody lists and the one her lobe notices most. A heavy stud pulls the front down and drags on the piercing over a long day.
What size earrings are best for kids, by age
These are starting points, not rules. Her lobe size matters more than her birthday.
| Age | Front size that usually suits | Style | Why |
|---|---|---|---|
| Toddlers, about 1 to 3 | 4mm | Smooth, round studs | Small lobes, small fingers that pull, and nothing to snag |
| Young children, about 4 to 7 | 4mm to 5mm | Studs with simple shapes | Big enough to see and enjoy, small enough to forget she's wearing them |
| Older children, about 8 to 12 | 5mm, or a little larger for occasions | Studs, with lighter styles as she gets older | Larger lobes carry a slightly bigger front without tilting |
| Teens | Whatever her lobe carries comfortably | Her choice, guided by weight | The size limit is now comfort, not age |
Two things hold at every age. A stud should sit flat against the front of the lobe without tipping forward, and the back should sit snugly without pressing into the skin behind. If you're choosing for a very young child, our article on what earrings are best for toddlers goes into that age in more detail.
Small studs or larger earrings: how they compare
| Small stud, 4mm to 5mm | Larger stud, 6mm and up | Hoops and dangles | |
|---|---|---|---|
| Weight on the lobe | Very light | Light to moderate | Varies widely, often heavier |
| Catching on clothes and hair | Rarely | Sometimes | Often |
| Sitting flat | Yes | Can tip forward on a small lobe | Hangs, so the hole carries the load |
| Comfortable for sleeping | Usually | Less so | Rarely |
| Everyday wear for a young child | Well suited | For older children | Occasions, older children |
The pattern is simple. The smaller and lighter the earring, the less it asks of her lobe. That's why a small stud is the everyday earring for most children, and why our article on what earrings she can wear every day starts from the same place.
How to measure earring size in mm at home
You don't need special tools for the front. A ruler with millimeter marks does the job.
- Lay the earring face up next to the ruler.
- Measure across the widest point of the front. For a shape such as a star or a heart, measure edge to edge at the widest place.
- Read the nearest millimeter. At this size, a 5mm front looks noticeably bigger on a small lobe than a 4mm one.
If you want to check mm of earrings she already owns, so you know which size she's comfortable in, measure her favorite pair the same way and use that as your guide when you buy the next.
How to measure earring post length
- Take the back off.
- Hold the ruler against the post, starting where the post leaves the back of the front.
- Measure to the tip. That's the post length.
How long should an earring post be? Long enough to pass through her lobe with room for the back to sit behind it without squeezing. A child's lobe is thin, so on a standard butterfly-back stud, length is rarely the problem. If the back has to be pushed hard against the skin to stay on, or if it sits loose with the post sticking out well behind, ask about the length before she wears them every day.
Measuring post thickness
Gauge is hard to measure accurately with a ruler, because the post is under a millimeter thick. Two practical routes work.
- Compare against a pair you know fits. If a new post looks noticeably thicker than her usual earrings, check before you push it in. A thicker post in a hole sized for a standard one can be uncomfortable.
- Ask a jeweler. A jeweler with calipers can measure a post in seconds.
Why weight matters as much as size
A front can be small and still heavy, if it's set with a large stone. Weight builds through the day. A pair that feels like nothing at breakfast can feel heavy by bedtime, and over months a heavy earring can lengthen the hole.
A simple test: hold the pair in your palm. If you can feel the weight clearly, her lobe will too.
Price follows size and material, too. If you're weighing that side of it, our guide to how much a pair of children's earrings should cost breaks down what you're paying for.
What we do
We make our studs in two sizes, 4mm and 5mm, with the 5mm in some of the larger styles. I chose those sizes because they suit a child's ear while still being wearable by an adult, so a pair can stay with her as she grows.
A pair is very light. It weighs about the same as a paperclip, possibly slightly less. I don't have a gram figure, and the paperclip is more useful anyway, because you can pick one up and feel it.
Every style is made on an S316L Surgical Steel core that runs through the setting, the post and the butterfly back. The Polished Surgical Steel range is that one material throughout. On the gold range, the whole earring is finished in pure 24 karat gold with Aunix™ 24K, our engineered gold finish, which is a gold-plating process. Independently tested by SGS to ASTM F2923, CPSIA and BSEN 71-3, with nickel release not detected under EN 1811.
If you'd like a first pair in the smaller size, the 4mm Flawless Crystal Stud Earrings in 24K Pure Gold are a small, flat-sitting stud. The rest of the range is on the 24K Pure Gold collection, and our guide to how to choose earrings for young ears walks through the other decisions.
Questions parents ask next
Is 4mm or 5mm better for a child? For a young child or a small lobe, 4mm. From about school age, 5mm usually suits, and many girls wear both depending on the style.
How long is an earring bar? On a stud, the bar is the post. Measure it from the back of the front to the tip. On a bar-style earring, the listing usually gives the full length of the bar.
Can a child wear adult earrings? Sometimes. A small, light adult stud can suit an older child. Adult earrings are often larger, heavier and have longer posts, so measure before you assume they'll fit.
Do bigger earrings stretch the hole? Heavy earrings worn every day can lengthen the hole over time. A small stud carries very little weight, so it puts little strain on the lobe.
What size are earrings for toddlers? Small and smooth, around 4mm, with nothing that hangs or catches. A secure back matters as much as the size.
Related reading
- What earrings are best for toddlers?
- What earrings can she wear every day?
- How much should a pair of children's earrings cost?
- How do I choose earrings for young ears?
About the author. Matt Westmore is the founder of purepixxi. He came to children's jewelry from manufacturing and sourcing rather than marketing, which means he has walked the factory floors and knows what is actually inside a product rather than what a label says about it. purepixxi uses two materials only, names them exactly, and has them independently tested.
