The Campmor Cascade II Regular-sized Poncho (52"x80", 12.8 oz) costs only $20 and comes in a strikingly bright shade of yellow ... or black, kiwi green, blue, or forest green. I'd highly recommend them.

They also sell a Tall-sized version (52"x104", 14 oz) for $22 (sorry, not available in yellow or kiwi green - only black, blue, or forest green).

My problem with the tall version is that tall people (me) not only need longer ponchos, but they could also use wider ponchos - for those long arms. The Exped Bivy Poncho is 62"x90" - an extra 5" per arm. I haven't seen the Exped Bivy Poncho for sale in a long while - not sure why.

Ken