Tax Information
Valuing your donated clothing is outlined in IRS Publication 561:
Used clothing and other personal items are usually worth far less than the price you paid for them. Valuation of of items of clothing does not lend itself to fixed formulas or methods. The price that buyers of used items actually pay in used clothing stores, such as consignment or thrift shops, is an indication of the value. An item of clothing which you take a deduction of more than $500 requires a qualified appraisal.

From the IRS’s Publication 526 deductions of less than $250:
You are not required to have a receipt where it is impractical to get one. For example – if you leave property at a charity’s unattended drop site. If you make a contribution that you plan to deduct more than $250 for, then a receipt will be provided by Red Apple Recycling on behalf of your public schools.

For more information on clothing and shoe contributions, please reference IRS Publications 561 and 526, or contact your tax professional.