karen, depending on what phone you have, you're photos will have a set size.
on the newer iPhones the resolution is quite high - so that you actually have a choice on the size you want to send on.
most newer phones have a fairly decent resolution - check in the settings - you might be able to change the size it stores.
on the TQS website you can upload photos up to 8 Mbyte - that is quite large - i generally upload photos at about 1 MByte or a bit higher.
it they are very large, the system has to downsize them - so that you spend a lot of time waiting for the large file size to upload, and then another wait while the system at the TQS end downsizes them to the maximum usable for the website... this just creates extra internet traffic - or data-traffic you have to wait for and (depending on your internet plan) you might have to pay for
good luck