Based on the WTP Urn Summary sheet the Cross featured ring measures.
1 5/8” Thickness (Tall), 3/4” Board width (width), and 2 7/16” Segment Edge Length (wide)
The cross is made by assembling three pieces. The center section and the left and right arm. These pieces are made by assembling a laminate for the center and for the two sides.
Cross Center Section:
cut 2 strips of yellowheart 3/4"thick, by 1/4" wide and about 14" long,
cut 1 strip of purple heart 3/4 thick by 1 1/8 wide and about 14" long
Glue the yellowheart to top and bottom of the purpleheart. to make the center laminate
After it is dried cut the laminate into 12 pieces that are 3/4" wide, x 1/4" x 1 5/8 tall.
*error on the side of longer for your laminate. it is good to have spare material.
Cross Arm Section:
cut a strip of yellowheart 3/4" thick by 1/2" wide and about 18" long
cut a strip of yellowheart 3/4" thick by 7/8" wide and about 18" long
cut a strip of purpleheart 3/4" thick by 1/4" wide and about 18" long
glue the yellowheart to the top and bottom of the purple heart to make the arms.
After it is dried cut the laminate into 24 pieces that are 3/4" by 1/4" by 1 5/8 tall
Glue the arms pieces to the center. Check to make sure the arms line up.
Sand the completed segment
Side Fillers
Cut a stip of yellowhear 3/4" thick by 1 5/8 wide and about long
Cut the yellowheart strip into 24 ea blocks of 3/4"x 1 1/2 wide by 1 5/8 tall
Glue the end fillers to the block that makes up the cross.
When cured sand to make sure its flat
mark the center of the cross.
Mark the center of the cross and measure out 1.2 inches on either side. The segment edge length is 2.4" for the ring. (2" 13/32)
Miter the two ends so you end up with a 2.4" SEL.
Hope this makes sense.
I would error on the side of making your laminates longer than needed. Spare material is good to have.