Do they enclose the ears or press against them? I can't tell how big they are.

With a center hole inside the padding of only about 1 & 3/4's inches around, these do not come close to enclosing my ears.

Will this headphone jack fit through the headphone jack on my iphone 5s life proof case?

Fits fine through my Otterbox Defender (iphne 5S)

Down the road, will 2-inch-diameter replacement foam earpads fit these Panasonic headphones?

I just measured them & they're actually oval, not circular. Approx dimensions are 2.25 x 1.75, so they're more than 2" at the longest dimension. You could try them, but more than likely, won't fit. Perhaps Panasonic sells some?

Will these work well outside brisk walk or running with an iPod?

We only use these on a computer, so I'm not sure how they'll function with movement. I can see them maybe working on a brisk walk, but they might be shaky for a run.

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Description

🎧 Elevate your everyday audio with sleek, noise-cancelling comfort

ON EAR CONTROL - Convenient volume control right at your fingertips
FEATHERLIGHT FIT - Ultra-light 34g design for all-day wear without fatigue
FOCUSED LISTENING - Built-in noise cancellation for immersive sound clarity
TANGLE FREE FREEDOM - Generous 4.5 ft cable length for flexible movement
UNIVERSAL COMPATIBILITY - Seamlessly connects to TV, PC, and smartphones via 3.5mm jack

The Panasonic RP-HT21 wired on-ear headphones deliver lightweight comfort at just 34 grams, featuring a universal 3.5mm jack compatible with multiple devices. Equipped with noise cancellation technology and on-ear volume controls, these headphones offer immersive sound and practical usability for professionals and casual listeners alike.

Specifications

Headphones Jack	3.5 mm Jack
Model Name	RP-HT21
Connectivity Technology	Wired
Included Components	Headphones - wired
Age Range (Description)	Adult
Material	Plastic
Specific Uses For Product	personal
Compatible Devices	TV, PC, Cellphone
Control Type	Volume Control
Item Weight	1.2 Ounces
Customer Package Type	Standard Packaging
Net Quantity	1 Count
Style	On Ear
Control Method	Remote
Number of Items	1
Cable Length	4.5 Feet
Earpiece Shape	On-Ear
UPC	163120595181 379882590528 182682341180 037988259052 100177326832 132017749488 689076738811 805095870770 804066527064 809185306859 069060216189 115970817241 012301986938 088037945464 112840387064 012307101014 675903999548 617407404531 012303529904 742996787564 808111645451 809385156292
Special Feature	Noise Cancellation
Global Trade Identification Number	00012301986938, 00037988259052
Manufacturer	Panasonic Consumer
Model	RP-HT21
Model Year	2009
Batteries	1 Lithium Ion batteries required.
Item model number	RP-HT21
Special Features	Noise Cancellation
Compiler	Panasonic
Microphone format	without microphone
Batteries Included	No
Batteries Required	No
Battery cell composition	Lithium Ion
Adapter	Panasonic
Reader	Panasonic
Form Factor	On ear, Over Ear
Marimba	Panasonic
Recorder	Panasonic
Transcriber	Panasonic
Does it contain liquid?	No
Includes Rechargeable Battery	No
Includes remote	No
Manufacturer	Panasonic Consumer
Item Weight	34 g

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