On AccuCut's web site you will find:
GO! Value Die (comes w/GO! Fabric Cutter, not included w/GO! Baby Cutter)
Item 55018
Regular Price: $29.99
Special Price: $23.99 (I just got this price e-mailed today in their sale flyer)
It includes (cut size):
• 2 triangles @ 2.5" W x 2.5"W
• 1 square @ 2.5"
• 1 square @ 4.5"
This is the only place they show a 4.5" (cut size) die. Hope this helps!
Here's the link directly to the die.
http://www.accuquilt.com/go-shop/die...value-die.html