Welcome to the forum 
Sighning up for lingerie testing is also a good option. You need to send your measurements in (there is a form in the link @Peitho so helpfully posted)
There can be well over 100+ people volunteering for a tester though so getting picked can take quite a while.
Read the section of writing good reviews in the link, i found it really helpful when i started.
(We actually had a discussion about the hows, whys and wherefors of testing here recently. So it may also be worth a read)