Standard size fits 80% of the general population and large 15%. This is the combo pack which includes one pair of each size for less than the cost of 2 separate pairs. Etymotic Research

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Etymotic Research ER20 ETYPlug Hearing Protection Earplugs, Large Clear Stem with White Tip (Clear)

Q: In this Amazon page there are 2 standard fit versions, one with a poly bag and another with a clamshell case. Is that the only difference bet the 2?

Yes, you're correct. Only difference is the packaging. Thanks for your interest. Brian / WiredForLess

Q: Has anyone tried using these at a firing range? Indoor or outdoor?

These are 1) too expensive and 2) too low NRR (-12dB) for shooting, even outdoors. They are intended to be able to listen to music at higher fidelity (even, flat reduction across all audible frequencies) at lower volumes, aimed at working musicians or concergoers. I have been playing rock music (drums, guitar, bass) since 1994 and I have used ETY20s since then b/c I can hear all the notes and all the music without muffling them out too much like traditional foam earplugs (usually NRR or -20 to -30dB) do. I also shoot pistols and rifles, and I would never use these for that. Even with my -34dB earmuffs, 9mm shots indoors are loud, so I double up with another foam earplugs under my earmuffs.

Q: Can I order the baby blue ear buds ?

Some people refer to the ER20-SMC as "baby blue" or "light blue". Standard fits most ears. The colors available in standard fit are SMC--blue tip or SMF--frost tip.

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In this Amazon page there are 2 standard fit versions, one with a poly bag and another with a clamshell case. Is that the only difference bet the 2?

Has anyone tried using these at a firing range? Indoor or outdoor?

what size?

Can I order the baby blue ear buds ?

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