Oh ya.
These are the original polyhedral dice that came with the 1981 Dungeons & Dragons Basic Box set, affectionately known as the magenta box set.
They were poorly cast from some hard strange plastic, likely a nuclear waste biproduct of the La Crosse boiling water reactor in Wisconsin.
Some dice bulged irregularly, some had sharp edges that were not trimmed off, and others had numbers that were barely pressed so you had dice that didn't roll properly with numbers that were so hard to see that TSR provided a wax crayon to color in the numbers to make them somewhat usable.
And we did not care. They rocked at the time.
Here is an advertisement for TSR's Dragon Dice, aka "random number generators", circa 1980.
Today there are a million sets of dice available from countless vendors.
If you have new players that have never played D&D before, I suggest you provide some color-coordinated player kits that players can take with them (like a grab bag at a party).
Large bag of assorted dice in multiple colors on Amazon.
Snap together dice trays on Amazon.
Once players decide if they are interested in playing the game regularly, then they can buy their own custom metal dice, with matching metal pewter dragon dish, a 3D-printed dice tower and custom wooden dice box with their spirit names engraved on it from Etsy - but for now, start off simple.
Soooooo pretty though...