Not intending to kill the mood or knock you down, but as a man I will voice my opinion that you'd be better off getting an item of clothing that is not stripy if you want to look good, unless it is a stripy miniskirt to give an impression of a phat ass.
To make some points that you should take seriously though:
-Fat people look fat when wearing vertically striped clothing.
-Fat people look fat when wearing horizontally striped clothing.
-Skinny people look skinny when wearing either type of clothing.
-Baggy clothing tends to hide excessive fatness, but will not hide a skeleton.
-Tight clothes only look good on fit women.
-The first rule of being fat is 'thou shalt not wear tight clothing'.
-Avoid the colour brown. It looks cheap and gives off a poo vibe.
-If you have nice legs, get a decent pair of tights or skinny jeans. They are good.
-Make sure your clothes don't stink of sh!t. Ask your friends to smell you to avoid this problem.
That is all you need to know for the rest of your life. (Even though you didn't ask about what i have written)
tl;dr - Don't get that stripy curtain-esque thing. Whether or not it makes you look fat is not the question. It looks bad.