Closest match with multiple criteria (3 criteria)

I am trying to come up with a formula that can automatically downselect to the closest box size out of a list of 20 or so box sizes with lengthxwidthxdepth as the 3 criteria.
I have been extremely close to get something working but then when i increase one of the box dimension values by 1 it screws it up again so I'm at a wits end!!!

Here is a simplified version of the table:

I'll give the table here:

ID....length.....width........Container Name....length....width
1.....600.........400.............Cont1................450........305
2.....400.........300.............Cont2................800........500
3.....200.........150.............Cont3................600........402
.......................................Cont4................250........200
Cont3
Cont1
Cont4

ID	Length	Width	depth
1	600	400	119
2	400	300	220
3	200	150	420

Container Name	length	width	depth
Cont1	450	305	430
Cont2	800	500	135
Cont3	600	402	250
Cont4	250	200	175

This is the formula that i'm currently using. I really don't understand it, and so that is the reason as to why I don't know how to formulate an extra criterion onto this formula:
=INDEX($G$2:$G$5,MATCH(TRUE,$I$2:$I$5-$C2+$H$2:$H$5-$B2=MIN(IF($I$2:$I$5>=$C2,$I$2:$I$5-$C2,MAX($I$2:$I$5)+MAX($H$2:$H$5))+IF($H$2:$H$5>=$B2,$H$2:$H$5-$B2,MAX($I$2:$I$5)+MAX($H$2:$H$5))),0))

Thanks in advance

Julian