problem with simple sql query

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PHP

MySQL

i have table supportContacts where sizeid has id's seprated by comma

now i want to fetch all records where size id has 1 in it ??

below is link
:

http://sqlfiddle.com/#!2/30bd2/1[^]

it works fine when i search for one id

now i want to select all column have size id 1 or 2

http://sqlfiddle.com/#!2/30bd2/2[^]

for that i have written query

select id, sizeid from supportContacts
WHERE FIND_IN_SET('1,2',sizeid)

which does not work ? any help