HI i am relatively new to this, but just wanted some help from other girls. When a guy is on the large side lol, i get really sore and bruised and this can last for about 5 days so means i cant see any other clients. I do use a standard lube, but wondered if there was anything else i can do, is there a better lube for this problem? or any other suggestions anyone might have. Help!

As Anika Mae says there are some positions that are less penetrative than others. Personally I find mish and doggy more so than others, unless I clamp my legs together with both. I do love spooning if the guy has a particularly big willy, especially as my fat arse prevents it from going in all the way,lol. 'Tis true. The problem can sometimes be though is that the guy will then want to lift your leg sideways then "want to get in there" as they get more carried away with the moment. So you'd need to control that.
Some lubes are definitely better than others. Durex's own brand does more for me than a tube of KY, as I find it dries out quicker.

Oh, yes, I didn't mention silicone lube because it doesn't suit everyone, but it's more slippery than oil and it's condom safe. I recommend Pjur Original or Woman, ID Millennium, and Wet Platinum. Pjur Original is the thickest of all of them, the ID and Wet ones are quite thin. My favourite is Pjur in the drop-stop tubes because it's the only container I've found that's completely leak free, not many places stock it but I get mine here.

Silicone lube is also great for hand jobs (especially good if you don't do OWO), but you can't use it with silicone toys so if you have them, keep a small bottle of something water based around.

I use durex sensilube which is good for the sensitive among us.  Also, too much lubricant can be a bad thing as far as pain goes due to the lack of control.  In other word, his cock can slide around too easily.  It's hard to define how much is too much though, as everyone is different.