These are the ones that I use:
https://www.ebay.co.uk/sch/i.html?_from=R40&_nkw=laser+trak+ear&_sacat=0&_sop=15
My missus tends to snore sometimes and I'm a very light sleeper, so the slightest noise and I'm awake.
When I'm wearing these, there have been occasions in the past where my missus is nudging me in the morning, 'cos my alarm is going off and I can't hear it.
A few tips if you buy any of the foam ear plugs:
Squash them down before you put them in your ear and then push them in as far as you safely can - this way the foam expands back to its original size/shape and completely fills your ear.
When you remove the ear plugs, pull them out slowly using the cord. I've pulled them out too quickly in the past and ended up snapping the cord.
It says they're only "one use" but I re-use them probably for a few weeks. You'll know when they need changing as they tend to go a bit soft and are not as good as keeping the noise out.
If you shop around, you should hopefully find them cheaper - I tend to try and pay £20 in total for a box of 100. I recently missed out on a chance of buying a box of 400 for approx £58.00 (they would have lasted me for aaaaages) ..... you snooze, you lose :(