Portfolio for Transfer Arch?

As they mention 'Please be aware that any portfolio submitted must be in a required format of 8.5x11 inches or 11x14 inches. Any portfolio exceeding these dimensions will not be considered ’

Does anyone know if a portfolio for Art/Transfer Arch is restricted to the size they mentioned(8.5x11 inches or 11x14 inches)?
Can it be smaller than 8.5x11 or between 8.5x11 and 11x14 inches since its not exceeding?

What can I use for putting them together because they said ‘do not submit any weighty covers or binders or boxes for the material’?

Do they prefer the portfolio itself to be artistic and creative or they will just look at the creative works in the portfolio.?
What do they want to see in Transfer Architecture Portfolio?
Also, anyone has examples of Arch Portfolio??

THX!