What are these shaped bricks used for?

[BHN25]

Hi all.
Hoping people can help me with what these shaped bricks could be used for? FYI, I'm looking to build traditional pompeii oven.
Left to Right per photo:
230 x 115 x 75mm - standard fire brick
230 x 115 x 75 / 57.5mm - arch brick?
230 x 115 x 75 / 57.5mm - wedge shaped brick?
I've picked these up second-hand.
Thanks
JD

[UtahBeehiver]

How many of each?

1. std can be used anywhere. 2. can be used on floor (see pic) or dome wall (cut in half). 3 can be use inner/outer arch and vent chamber.