Hi Jas,
A few things. Just brushing the end is far too large. Also, The width that you will need will change based on your foot length. Additionally, Wide is not all one thing. There are varios widths available. For instance E width needs to be treated differently than EEE. Width is every bit as important as length.
Please measure your feet using this method:
Kick your heel (barefoot please, no socks) back against a wall. Mark the floor exactly at the tip of your toe (the one that sticks out furthest - which toe this is will vary by rider). Measure from the mark on the floor to the wall. That is your foot length and is the only measurement that you will want to use. Measure in centimeters if possible, but if not, take inches and multiply by 2.54 (example: an 11.25 inch foot x 2.54 = 28.57 centimeters). For width please place the inside (medial side) of your foot against a wall. Please then measure from the wall out to the widest point on the lateral (outside) of your foot.
Ok I remeasured as directed and this time I got my wife to help and we used a straight piece of board on the other side to make sure I was more accurate.
Right: 28.5cm length 10.4cm width
Left: 28.5cm length 10.7cm width
There is one other variable which is this measurement is first thing in the morning not long out of bed. Due to a previous dvt in my left leg, my left leg and foot can swell a bit during the day, so I might recheck again a bit later.
I also heavily pronate, my arches pretty much collapse so I would guess this flattens the foot out a certain amount as well.
I retried the boot on and I think I undersold the toe touching the front. There is slight pressure on big toe when standing straight, but nothing uncomfortable. I also don't feel any room width wise in that I can feel both sides of the boot on my foot, so makes me worried if I went to standard width burton it would be actual pressure. The current boots I only wore for 10 days of snowboarding in total as well so may not be worn in yet. This next trip will be a total of 13 days snowboarding.
Regarding the left toe going numb, this didn't occur when I was able to do wide carves but it did happen when I was doing too much heel side stopping (i.e when i was struggling with a section of the mountain) so I think it was related to weight being put on front foot too much for too long (was really bad down a really long cat track that I struggled big time on). I think the issue was:
Boot compression syndrome. This is when the boot puts too much pressure on the Tibial nerve or its lower branches (the lateral or medial plantar nerves).