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rigid
$0.95 if it's a regular envelope; $1.50 if it bends easily and in a larger envelope; $2.12 if it's rigid or more than 1/4 in. thick and in a larger envelope.
"The cost to mail anything is determined by its size and weight. A CD will not fit in a letter-size envelope, so at least a large flat envelope is needed. These start at $0.88 for one ounce. An average CD weighs 0.58 ounces, but the weight of the case and envelope must also be factored in. Even the lightest CD packaging and envelope will likely put the weight just over one total ounce, increasing the price to $1.08 to mail one CD. Additional charges will apply for heavier envelopes or CD cases, extra handling (for example, if it is determined to be ""rigid,"" which means it cannot go through the machines), or if the clasp is used to seal the envelope (because this means it cannot go through the machines)."
Blimps are non-rigid airships. Their shape is determined by the design of the envelope (inflatable bag). Most common airships are shaped like a cigar.
If its US domestic and a standard letter it costs 59 cents First Class. If the item is rigid or in an odd sized envelope it costs 79 cents First Class. You can calculate your postage at http://postcalc.usps.gov/.
For a DVD in regular rigid case, typically around $ 1.75 for Parcel, but depends of course on your method of shipping.
If someone were interested or looking to purchase rigid foam sheets for insulation purposes they could most likely check their local hardware stores as shipping would be rather extreme depending on size and weight.
Rigid is immovable, unbending. Semi-rigid can move in a limited way.
no they are not rigid.
Rigid polystyrene is a hard plastic Rigid polystyrene is a hard plastic
Firm; stiff; unyielding; not pliant; not flexible., Hence, not lax or indulgent; severe; inflexible; strict; as, a rigid father or master; rigid discipline; rigid criticism; a rigid sentence.
most rigid