This is a check list of things you need to provide to get an accurate specification for a t-shirt order.
Quantities
Split by size
Process
Screen print / Digital print etc.
Shirt manufacturer
Guildan / Continental / American Apparel etc
Artwork
In high resolution (Preferably vector: PDF, EPS, but JPG, or PNG are possible)
Positioning information
Measured in centimetres from the nearest hem or edge of the fabric. e.g. Centred on the Shirt, 5cm from the hem of the neck at the front.
Include an illustration for clarity if possible.
Colours
Provided ideally as a Pantone if screen printed.
Other considerations
Tagging, Bagging / Packing / Folding / Embroidary