Specifying whether a set of combo boxes will enter data to a new row?

[BPSJACK]

Hi there, I have a basic userform with three comboboxes (WIDTH1,LENGTH1,HEIGHT1) . The users selections will be be sent over to the next empty row in sheet 2.
I want to be able to have multiple sets of 3 comboboxes (in one userform), whereby data from each 'set' of comboxes will enter to the next empty row in Sheet 2. EG WIDTH2,LENGTH2,HEIGHT2 will go to a new row, and WIDTH3,LENGTH3,HEIGHT3 will be entered to a new row and so on.

Any help as to how I might accomplish this would be much appreciated.
Here is my current setup:

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[BPSJACK]

I've changed some of the wording hopefully it will be a bit clearer.

[DBY]

Hello
This is perhaps not very elegant and I've not tested it, unless I recreate your form but maybe something like:

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Hope this helps.
DBY