This is how the Tigger costumes have changed over the years.
1968-1995, January 12, 2001: Tigger is near-neon and inspired by his animated version, but with a black nose. This costume retired in California and Paris in 1995 and Florida in 1995 again. It also appeared in the groundbreaking ceremony of Hong Kong Disneyland in January 12, 2001.
Disney on Parade, 1973: This version of Tigger is a lot different from the one used in the Disney Parks. Though he looks accurate to the animated version, he is slimmer and has a shorter head, thinner and shorter stripes, and a slightly longer tail.
1995-present: Tigger's head becomes larger and rounder, his nose becomes bigger and black material in the mouth is between the two jaws.
This Tigger costume is a closer match to his animated counterpart. This variant is seen in Disney Live! shows and has an articulated head.