for Walmart Glendora, CA. Do you have 3" or 4" memory foam mattress toppers for a King size bed in store? (not a cal-king) Thanks

Why would you ask that here?

Omg what kinda question is that

If you haven't noticed, this place is not run by Walmart. Hence the answers you are going to get will not be accurate. Please go to Walmart. Com and ask your question over there. Or better, either pick up the phone and call them or drive to the store.

Yes

They have all different type of memory foam toppers for all sizes.

Yes they have them