*UPDATE* I got Eibach springs and spacers. Is 25mm not good enough for the rear?
 

I got 2015 BRZ Series.Blue and looking to just use the stock wheels on them for my setup.

What size spacers should I get to make it a bit more flush? I'm assuming 20mm front, 25mm rear? Any particular brands, types, etc.?

This is lowered with Eibach Pro-Kit.

EDIT: Update guys... I got the Eibach pro-kit springs and pro-spacers on now...

20mm at front, 25mm at rear. But it still looks like the rear is tucked in more than the front? Is this normal? Should I have gotten 30mm instead for the rear? :(

They are 17x7 +48 I believe which is the same as the stock wheels for all other cars.

https://www.japanparts.com/parts/detail/40551

Should be identical to the oem brz/frs wheel just different design/color

Oh nice it's a bit wider than the OEM, 17x7.5 +48

The ones that are on teh NA blues are 17x7

Oh okay thanks for clarifying. The same then.

Ah my bad must have grabbed the wrong one there. Unless they labeled it wrong

Hey guys... I decided to get Eibach spacers, 20mm front, 25mm rear...

Good decision?

Update guys... I got the Eibach pro-kit springs and pro-spacers on now...

20mm at front, 25mm at rear. But it still looks like the rear is tucked in more than the front? Is this normal? Should I have gotten 30mm instead for the rear? :(

25 or 30 is so close in looks it's really splitting hairs. I had 25's in the rear of mine for a long time and loved it. Be happy, your Blue will look better than most others.

Or maybe getting 15mms instead for the front...

15 front, 20 rear gives a really clean look.

I'm also thinking perhaps I need alignment... That's probably throwing some off too.

The rear suspension gets more negative camber the more you lower the car. This causes the rear to "tuck" more. This is generally desirable. However, if you really don't want any negative camber in the rear, you can "fix" it by adding adjustable rear lower control arms.