Undergarments with the right fit?

Never knew it can be sooooo hard to find panties that fits well! Renee doesn't seem to like those of normal panty cut and thus, I've resorted to ordering 10pcs(in a set, no choice) from a japan online shopping web.

However, the thigh opening of these panties is now abit tight for her and after altering n re-altering few times(juz to catch the correct opening size) on so many pairs of her panties till my fingers hurt from all the sewings, I've still yet to get the perfit fit!

Decided to just order bigger size from the same web again but there's no more stock for the the set with the nicer designs but how? my fingers sore and she kept complaining about being uncomfortable wearing the existing ones.

After searching a few children shops, I finally found the panties(on thurs, 18 Jul) which has similar cutting as those which I've ordered from the web but again, no stock for her size and she didnt like the other design(wif frills at the back)... Luckily another shop(also near her playgroup sch) also sells panties of such cut, bought a pack(S$12 for 3pcs) to try, but then, it's kinda too big even though the rubber opening at the thigh fits...

[These pics are shown here for the benefit of a friend :) ]

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She seems to like it initially but after the 2nd day of wearing these newly bought panties, she decided to wear a pair of the 'old'ones today :( haiz, actually, I also find her looking abit sloppy in them lah, cos the size is really abit too big for her...

So, for her sake, I decided to go through the 'pain & frustrations' again and went down to Spotlight on friday to buy a pack of 'rubber band' of a thinner width. Have just altered a pair today and shall see how's the sizing, if this new altered size fits, then it's back to more altering liao *dread* :( hahaha