Size and position, mostly. A hoop hangs below the lobe and moves. A huggie is sized to close around the lobe itself, so it sits flat against the ear and stays where it is put.

The closure is the other half of it. Every style here snaps shut — the hoop clicks closed against the lobe rather than screwing together — so there is no small back to lose and nothing to thread in front of a mirror.

That is what makes it the format people wear continuously. Nothing protrudes to snag on a jumper or a hairbrush, nothing swings against the neck, and nothing has to be thought about at bedtime. It is also why huggies stack well: a small hoop in a second or third piercing sits close to the ear and reads as part of the same line rather than competing with whatever is in the lobe.

The base metal is 316L surgical-grade stainless steel — 55 of the 56 record it by name on their product page. The L is low carbon, and it is the grade used for surgical implants, chosen for how it behaves against skin and salt rather than for how it looks.

Gold-toned and silver-toned pieces are plated over that steel rather than over brass. It matters for anything worn in water: plated brass wears through to copper, and copper is what leaves a green mark. There is more on why that happens, and which metals do it.

The same 55 record a waterproof rating — safe for shower, pool, ocean and sweat — and certification to ASTM F2923-20, the American standard for children's jewelry, which limits what a piece may release against skin. 37 record a nickel-free rating. The remaining listings have not had those fields filled in; it is a gap in the record rather than a different product.

Twenty-four of the styles state a diameter, and those run from 8mm to 21mm. The difference is easier to picture than to read: an 8mm reads as a thin ring hugging the lobe, a 12mm reads clearly as a hoop from across a room, and the largest sit away from the ear and behave more like a small hoop than a huggie.

For a second or third piercing, smaller is usually the answer — there is less room above the lobe, and a large hoop will rest on whatever is in the piercing below it.

27 of the 56 carry a charm and the other 29 are plain. A charm huggie reads as an earring on its own; a plain one is the thing you build a stack around. 39 of the styles are gold-toned and 11 silver-toned.

If you want every huggie and mini hoop rather than only the water-rated ones, huggie and hoop earrings is the larger page. For the same construction as a flat back stud, there are waterproof flat back studs, and the full range of screw-on flat backs is in the flat back stud collection. Smaller versions for a child are in kids' huggies.

It snaps. The hoop hinges open, goes through the piercing and clicks closed against the back of the lobe, so the earring is a single closed ring while it is being worn. There is no separate back, which is the main way a small earring gets lost.

Yes, and that is what the waterproof rating on each product page is recording. Water does nothing to 316L. What shortens the life of a plated finish is residue left sitting on it — chlorine, salt, sunscreen, perfume. Rinse with fresh water after a pool or the sea and dry before they go back in a drawer. There is more on what actually happens to an earring you never take out.

A huggie sits flat against the lobe, so there is very little standing away from the ear to press into a pillow. Most people who wear them continuously leave them in overnight. If a particular style has a charm that hangs, that is the one to check before sleeping in it.

Stainless steel itself does not tarnish the way sterling silver does — that is one of the reasons the range is built on it. What can change over time is the plated colour on a gold-toned or silver-toned piece, and what accelerates that is residue rather than water. Some styles record a tarnish-resistant rating on their product page; check the individual listing rather than assuming it across the range.

Yes, and it is one of the better uses for them. A huggie sits close enough to the ear not to rest on whatever is in the piercing below it, which is the usual problem with a full-size hoop higher up.

The metal is the thing that matters — most reactions are to nickel rather than to the earring itself. 37 of these record a nickel-free rating, and 55 record certification to ASTM F2923-20, which sets a limit on nickel release against skin. Each product page lists what that style records. The wider hypoallergenic and waterproof range covers the same construction across studs, huggies and necklaces.