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If you want a wired on-ear headset built for clear voice calls and long work sessions — and one that tends to sit more comfortably on a bigger head — choose Koss CS300-USB; if you need a safe, kid-sized pair of on-ear headphones with a locked volume limit for a child, choose IMYB Kids Headphones. That is the honest split. These two share the "on ear headset" label, but they solve completely different problems, and picking the wrong one wastes your money. This comparison is framed around the on ear headset question, including the "for big head" angle that sends a lot of shoppers hunting in the first place.
• Koss CS300-USB — biggest strength: a noise-canceling electret microphone on a flexible boom, paired with a full-size double-sided on-ear design and a long 8-foot USB cable. It is a communication tool first.
• Koss CS300-USB — biggest trade-off: it is wired only, plugs into USB-A, and is clearly aimed at adults in offices, labs, and call centers — not at children.
• IMYB Kids Headphones — biggest strength: a factory-locked 85dB volume ceiling with no adjustable buttons, plus hypoallergenic memory foam earpads and a lightweight build.
• IMYB Kids Headphones — biggest trade-off: it is a 3.5mm listening headphone with no microphone, so it cannot handle calls, meetings, or voice software.
• Pick Koss CS300-USB if you take calls, dictate, teach, or game and want your voice heard clearly.
• Pick IMYB Kids Headphones if you are buying for a child aged roughly 2–12 and hearing protection is the priority.
The CS300-USB is a dual-sided on-ear communication headset. Dual-sided means you get an earcup on both ears, which matters if you want to stay immersed in a call or a lecture rather than half-listening. The D-Profile shape and soft, pillow-like on-ear cushions are the parts that matter most for a bigger head: a form-fitting profile spreads contact around the ear instead of clamping down on one hot spot, and the lightweight build is designed to survive an all-day wear schedule. I would not call it a universal fit for every head size, but the design intent is clearly long-session comfort rather than a tight squeeze.
The real reason to buy it is the microphone. It is a noise-canceling electret mic on a flexible arm, which means you can bend the boom to sit near your mouth instead of hoping your voice carries. That combination — noise canceling plus a flexible arm — is exactly what you want for conference calls, telephony, language-learning software, listening labs, testing, and hands-free office work. Koss also lists compatibility with Dragon Naturally Speaking, so dictation is squarely in scope. The frequency range runs 20 Hz to 20,000 Hz with a dynamic driver, so playback is full-range, not just voice.
Connection is wired USB-A through a single-entry 8-foot cable, and there is an inline volume control plus active noise cancellation. The 8-foot length is a genuinely useful detail: it lets you stand up, pace, or reach a tower PC under a desk without yanking the headset off your head. You should skip this one if you need wireless freedom, if your device only has a 3.5mm jack, or if you are shopping for a young child. It is an adult work tool, and the lifetime warranty description backs up that positioning. If cost is your deciding factor, check the current price on Amazon using the button on this page rather than guessing.
The IMYB V1 is built around one idea: protecting young ears. The volume is factory-locked at 85dB with no adjustable buttons, which means a child cannot crank it up even if they try. If you have ever watched a kid hold a volume rocker down until it maxes out, you understand why that matters. Inside, 40mm dynamic drivers with a 20 Hz–20,000 Hz range and 32-ohm impedance deliver clean stereo sound for school, online classes, audiobooks, and music. Sensitivity is listed at 85dB, matching that locked ceiling.
Comfort is the other half of the story. The earpads are hypoallergenic soft memory foam wrapped in protein leather, and the materials are BPA-free and non-toxic. The headset weighs about 0.35 lb (the listing also states 4 ounces), which is light enough that a small child is not fighting the weight of it. The adjustable headband and flexible swivel earcups are sized for ages 2–12, so the fit grows with your child instead of becoming useless in a year. The oval on-ear earcups are a kid-scale shape, not an adult one.
It connects over a standard 3.5mm jack with a tangle-free cable, which covers iPads, tablets, Kindles, phones, and in-flight entertainment. There is a touch-based volume control and sound isolation, though remember the ceiling is locked. The trade-offs are real: no microphone, so it cannot join a Zoom class where speaking is required; no USB; and a 1-year warranty rather than a lifetime one. Skip it if you need a headset for calls or dictation, or if the user is an adult. It is a listening headphone for children, and it is very good at that narrow job.
• Best for clear voice on calls → Koss CS300-USB. The noise-canceling electret mic on a flexible arm is the deciding feature.
• Best for hearing protection → IMYB Kids Headphones. The locked 85dB limit with no adjustable buttons is the whole point.
• Best for a bigger head → Koss CS300-USB. The D-Profile fit and pillow-like on-ear cushions are designed for adult, all-day wear, which is why people searching for over ear headphones for big head often end up in this category.
• Best for kids ages 2–12 → IMYB Kids Headphones. The adjustable headband and swivel earcups are explicitly sized for that range.
• Best for long cable reach → Koss CS300-USB. An 8-foot single-entry USB cable beats a typical short 3.5mm cord.
• Best for tablets, Kindles, and phones → IMYB Kids Headphones. The standard 3.5mm jack plugs into nearly anything a child already owns.
• Best for dictation and language software → Koss CS300-USB. Koss lists Dragon Naturally Speaking compatibility and a full 20 Hz–20,000 Hz range.
• Best for all-day lightweight wear on a small head → IMYB Kids Headphones. Around 0.35 lb with memory foam earpads is built for that.
One note if you are also weighing wireless options: if you are comparing this against best true wireless earbuds for big head or ipx7 waterproof sports earbuds for big head, understand that neither product here is wireless or water-rated. The Koss is wired USB, and the IMYB is wired 3.5mm. Different category entirely.
If I were buying for myself — an adult who takes calls, dictates, and wants a headset that behaves well on a larger head — I would buy the Koss CS300-USB. The flexible noise-canceling mic arm, the 8-foot USB cable, the inline volume control, and the D-Profile on-ear fit add up to a tool that does a job nothing else in this matchup can do. If I were buying for a child, I would buy the IMYB Kids Headphones without hesitation, because the locked 85dB limit and kid-sized adjustable fit are exactly right for ages 2–12. Different buyers, different answers — but for the on ear headset question framed around a bigger head, Koss is my pick.
An on-ear headset is a headset whose earcups rest on the outside of your ears rather than surrounding them. Both products here are on-ear designs — the Koss CS300-USB uses a double-sided on-ear layout with soft cushions, and the IMYB uses oval on-ear earcups sized for children.
An over-ear headset has larger earcups that fully enclose your ears. Neither product in this comparison is over-ear — both are on-ear. If you specifically want an over-ear fit for a big head, you would be looking at a different category than either of these two.
A single-ear setup means wearing one earcup so the other ear stays open to your surroundings. The Koss CS300-USB as listed here is a double-sided design, so both ears are covered; if you want the single-sided version, Koss notes that as a separate option.
If you mean adjusting the earcup to fit, the IMYB Kids Headphones have flexible swivel earcups and an adjustable headband so you can angle and extend them to sit properly on a child's ears. The Koss CS300-USB relies on its form-fitting D-Profile and soft on-ear cushions rather than a swivel mechanism.
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