I am finally going to buy a birdcage from mature Metal delivered to UK, can you advise on sizing. I am 7.5cm virtually 3" long flaccid. (Not sure wether to go for 2 3/4" or 2 1/2" length 3.3cm diameter 2" ring What cage ring gap did you guys buy 1/4 or 3/8 gap May finally go longer term locked??? Cheers.